My Pro Street

P0084 Code Explained: Exhaust Valve Control Solenoid Circuit Bank 2 Causes, Symptoms & Fixes

P0084 code displayed on an OBD-II scanner with the Bank 2 exhaust valve control solenoid, electrical connector, VVT oil passages and exhaust camshaft actuator highlighted.

If your OBD-II scanner displays P0084, your vehicle’s Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a malfunction in the Bank 2 exhaust valve control solenoid circuit.

The generic OBD-II definition for P0084 is:

Exhaust Valve Control Solenoid Circuit Bank 2

Depending on the manufacturer or scan tool, the description may appear as:

P0084 is the general electrical circuit code for the Bank 2 exhaust valve control solenoid. It belongs to the following code group:

This sequence is important because P0084 does not specify whether the circuit voltage is consistently high or low. It indicates that the PCM has detected a broader electrical fault involving the Bank 2 exhaust valve control solenoid.

The exhaust valve control solenoid is part of the engine’s variable valve timing system, commonly abbreviated VVT. It regulates engine-oil flow to the Bank 2 exhaust camshaft actuator or cam phaser, allowing the PCM to advance or retard exhaust valve timing.

Common P0084 causes include:

Possible symptoms include:

P0084 is generally a moderate-severity fault. The engine may continue running, but the PCM may disable Bank 2 exhaust camshaft adjustment and hold the camshaft in a default position until the electrical problem is repaired.

For additional diagnostic information, visit:

P0084 Quick Facts

ItemInformation
OBD-II CodeP0084
DescriptionExhaust Valve Control Solenoid Circuit Bank 2
CategoryPowertrain
SystemVariable Valve Timing
Main ComponentExhaust Valve Control Solenoid
Affected SideBank 2
Fault TypeGeneral Electrical Circuit Malfunction
SeverityModerate
Safe to Drive?Sometimes, for a short distance
Typical Repair Cost$100–700

What Does P0084 Mean?

P0084 means the PCM has detected abnormal electrical behavior in the circuit controlling the Bank 2 exhaust valve control solenoid.

The affected circuit may include:

The PCM may store P0084 when it detects:

P0084 does not automatically prove the solenoid itself has failed.

The problem may be in the:

Generic diagnostic references classify P0084 as a Bank 2 exhaust valve control solenoid circuit fault and list wiring, solenoid, oil-related and PCM problems among the possible causes.

What Is Bank 2?

Bank 2 is the side of the engine that does not contain cylinder number 1.

Bank 2 only exists on engines with more than one cylinder bank, such as:

Inline engines normally have only one bank and therefore should not use a Bank 2 designation for this circuit.

Bank 2 is not automatically:

The physical location depends on the manufacturer’s cylinder-numbering system.

Use:

to identify Bank 2 correctly.

Replacing the easier-to-reach solenoid and hoping it belongs to Bank 2 is less diagnosis and more automotive roulette.

What Is an Exhaust Valve Control Solenoid?

The exhaust valve control solenoid is an electrically operated oil-control valve used by the variable valve timing system.

Depending on the manufacturer, it may also be called:

The solenoid controls pressurized engine oil flowing to the exhaust camshaft actuator.

By changing this oil flow, the PCM can advance or retard exhaust camshaft timing according to:

Exhaust camshaft timing can influence:

P0084 indicates an electrical control problem. It does not automatically mean the camshaft actuator, timing chain or camshaft itself has failed.

How Variable Valve Timing Works

A typical variable valve timing system includes:

  1. Engine oil supply
  2. Oil passages inside the cylinder head
  3. Exhaust valve control solenoid
  4. Exhaust camshaft actuator or phaser
  5. Camshaft position sensor
  6. Crankshaft position sensor
  7. PCM control strategy

When the PCM requests an exhaust camshaft adjustment:

  1. It changes the electrical command sent to the solenoid.
  2. The solenoid redirects pressurized engine oil.
  3. Oil enters one side of the camshaft actuator.
  4. The actuator rotates the camshaft relative to its timing sprocket.
  5. The camshaft position sensor reports the new position.
  6. The PCM compares desired timing with actual timing.

If the electrical circuit fails, the PCM may no longer be able to control oil flow accurately.

It may then:

How the Exhaust Valve Control Solenoid Circuit Works

Many exhaust VVT solenoids use two wires:

The PCM may operate the solenoid using pulse-width modulation, or PWM.

PWM allows the PCM to regulate:

The PCM may monitor:

A common low-side-controlled circuit works like this:

  1. The solenoid receives battery voltage.
  2. The PCM switches the other side toward ground.
  3. Current flows through the solenoid coil.
  4. The magnetic field moves the internal oil-control valve.
  5. Engine oil is redirected to the camshaft actuator.

If the electrical response does not match the PCM command, P0084 may be stored.

What Does “Circuit Malfunction” Mean?

A circuit malfunction means the PCM has detected an electrical problem but has not necessarily classified it as consistently high or low.

Possible electrical conditions include:

For comparison:

CodeDescriptionTypical Meaning
P0084Exhaust Valve Control Solenoid Circuit Bank 2General electrical fault
P0085Exhaust Valve Control Solenoid Circuit Low Bank 2Voltage below expected range
P0086Exhaust Valve Control Solenoid Circuit High Bank 2Voltage above expected range

P0084 is the broadest code in this group.

P0084 vs P0078

CodeAffected Bank
P0078Exhaust Valve Control Solenoid Circuit Bank 1
P0084Exhaust Valve Control Solenoid Circuit Bank 2

Both codes indicate a general electrical problem involving an exhaust valve control solenoid.

The difference is the affected cylinder bank.

If both codes are stored, inspect for a shared problem such as:

Two solenoids can fail simultaneously, but one shared electrical fault is usually more convincing.

P0084 vs P0023

P0023 is generally defined as:

“B” Camshaft Position Actuator Circuit Bank 2

P0084 is defined as:

Exhaust Valve Control Solenoid Circuit Bank 2

Depending on the manufacturer, both codes may involve the same Bank 2 exhaust oil-control solenoid.

The distinction may involve:

Always use the service information for the exact vehicle, engine and code.

P0084 vs P0085 vs P0086

P0084

P0084 means the PCM has detected a general electrical malfunction.

Possible causes include:

P0085

P0085 indicates that the circuit voltage or driver feedback is below specification.

Common diagnostic directions include:

P0086

P0086 indicates that the circuit voltage is above specification.

Common diagnostic directions include:

Symptoms of P0084

Possible symptoms include:

Generic P0084 references commonly list reduced engine performance, increased fuel consumption and possible starting problems among the likely symptoms.

The severity depends on:

Can P0084 Cause a Rough Idle?

Yes.

Exhaust camshaft timing affects:

If the Bank 2 exhaust camshaft becomes fixed in an unsuitable position, the engine may:

However, rough idle can also be caused by:

Confirm that P0084 is active before blaming every idle problem on the Bank 2 exhaust VVT solenoid.

Can P0084 Cause Poor Acceleration?

Yes.

Exhaust camshaft timing contributes to:

When Bank 2 exhaust VVT is disabled, the engine may feel:

The engine may also feel uneven because Bank 1 and Bank 2 are no longer following the same timing strategy.

Can P0084 Cause Misfires?

P0084 may contribute to Bank 2 misfires if incorrect exhaust camshaft timing affects:

However, do not assume the VVT code caused every misfire.

Also inspect for:

Misfires concentrated on Bank 2 may increase suspicion that the P0084 fault is affecting camshaft operation.

Common Causes of P0084

1. Failed Bank 2 Exhaust VVT Solenoid

The solenoid may fail electrically because of:

Generic P0084 references identify exhaust valve control solenoid failure as a common cause.

2. Open Solenoid Coil

The electrical winding inside the solenoid may break.

An open coil usually measures:

The PCM may detect that the circuit does not draw current when commanded.

3. Shorted Solenoid Coil

The internal windings may short together.

This can cause:

A shorted solenoid should be replaced.

Repeatedly installing a new fuse without testing the coil is simply allowing the fault to continue submitting the same complaint.

4. Disconnected Solenoid Connector

The connector may have been left unplugged during:

A disconnected component creates an open circuit.

5. Loose Electrical Connector

A connector may appear attached but fail to maintain electrical contact because of:

6. Backed-Out Connector Terminal

A terminal may slide backward when the connector is installed.

Inspect for:

An apparently connected plug can still contain one completely disconnected circuit.

7. Corroded Connector Terminals

Corrosion can create:

Inspect for:

8. Oil Inside the Connector

Engine oil may enter the connector because of:

Oil can:

Repair the source of the leak rather than repeatedly cleaning the connector.

9. Water Intrusion

Moisture may enter through:

Water can cause:

10. Broken Wiring

The harness may break because of:

The conductor may break inside insulation that still looks normal.

11. Chafed Engine Harness

The harness may rub against:

A chafed wire may:

12. Heat-Damaged Wiring

Bank 2 exhaust-solenoid wiring may be routed near:

Heat can cause insulation to become:

13. Control Wire Shorted to Ground

A PCM-controlled wire may contact:

A short to ground may produce:

14. Control Wire Shorted to Battery Voltage

The control wire may contact:

A short to voltage may produce:

15. Missing Solenoid Power Supply

The solenoid may receive power through:

A failed power source can create a general circuit fault.

If several actuator codes are stored, inspect shared power before replacing multiple components.

16. Blown Fuse

A fuse may blow because of:

Do not install a larger fuse.

The original fuse was not being overly cautious. It was preventing the harness from becoming a heating element.

17. Failed Engine-Control Relay

A failed relay may cause:

Check whether the relay also powers:

18. Excessive Circuit Resistance

A wire may have continuity but still contain too much resistance to operate the solenoid properly.

Possible causes include:

Use voltage-drop testing under load rather than relying only on continuity.

19. Incorrect Replacement Connector

A replacement pigtail may have:

Always verify the pinout using the wiring diagram.

Matching wire colors is helpful only when everyone involved has agreed on the same colors.

20. Incorrect Replacement Solenoid

A replacement solenoid may have:

A new part can still be:

New packaging is not an electrical specification.

21. Low Engine Oil Level

Low oil does not normally cause the circuit fault directly.

However, the VVT system still depends on adequate oil pressure.

Low oil can cause:

Generic references for P0084 commonly include low oil level among the broader conditions that should be checked.

22. Dirty or Sludged Engine Oil

Contaminated oil may restrict:

Dirty oil is more likely to cause timing-performance codes, but it may coexist with an electrical solenoid failure.

An oil change will not repair a broken control wire, but it may prevent the freshly repaired VVT circuit from discovering a second problem immediately afterward.

23. Incorrect Oil Viscosity

Oil that is too thick or too thin may cause:

Use the manufacturer-required:

24. Clogged Solenoid Screen

Some exhaust VVT solenoids contain a fine filter screen.

It may become restricted by:

A clogged screen generally causes a hydraulic performance problem, but it should be inspected if camshaft response remains poor after the electrical fault is repaired.

25. Restricted Oil Passage

Oil passages inside the cylinder head may become blocked by:

This condition is more likely to cause:

P0084 should still be diagnosed electrically first.

26. Mechanically Stuck Camshaft Phaser

A stuck camshaft actuator may cause:

A stuck phaser does not normally create the electrical circuit fault by itself.

Do not replace the cam phaser until the solenoid circuit has been tested.

27. Camshaft Position Sensor Fault

The camshaft position sensor provides feedback to the PCM.

A failing sensor may cause:

It is not a common direct cause of P0084, but related codes may complicate diagnosis.

28. PCM Power or Ground Problem

A PCM power or ground issue may interfere with:

Inspect:

Multiple unrelated actuator codes increase the likelihood of a shared electrical problem.

29. PCM Software Issue

A calibration problem may cause the PCM to:

Check for:

30. Failed PCM Driver

The internal PCM driver may fail because of:

Only suspect the PCM after confirming:

Replacing the PCM before checking the two-wire solenoid connector is a remarkably expensive method of discovering corrosion.

Is P0084 Serious?

P0084 is generally considered a moderate-severity code.

The engine may continue running, but Bank 2 exhaust camshaft adjustment may be:

Possible consequences include:

P0084 becomes more serious if:

Can You Drive With P0084?

You may be able to drive a short distance if:

Avoid continued driving if:

P0084 usually does not cause immediate internal engine damage by itself.

Driving with low oil pressure, severe timing noise or a harness that is actively overheating is another matter entirely.

How to Diagnose P0084

Step 1: Scan All Stored Codes

Check for:

Record:

Do not clear the codes before recording diagnostic data.

Step 2: Confirm the Correct Definition

Verify that the scanner identifies P0084 as:

Exhaust Valve Control Solenoid Circuit Bank 2

P0084 is the general circuit code. P0085 is circuit low, and P0086 is circuit high.

Step 3: Identify Bank 2

Locate:

Do not confuse:

Step 4: Check Engine Oil Level

Park the vehicle on level ground and verify:

Correct oil problems before performing active VVT tests.

Step 5: Inspect Oil Condition

Check for:

Perform an oil and filter change if necessary, but continue electrical diagnosis because P0084 is a circuit code.

Step 6: Locate the Bank 2 Exhaust Solenoid

The solenoid may be mounted:

Use service information to identify the correct component.

Step 7: Confirm the Connector Is Attached

Check whether the connector is:

An unplugged component should always be ruled out before advanced testing.

Step 8: Inspect the Connector

Disconnect the connector and inspect for:

Repair connector damage before replacing the solenoid.

Step 9: Inspect the Wiring Harness

Follow the harness toward the PCM and power-distribution system.

Look for:

Step 10: Check Fuses and Relays

Identify any fuse or relay supplying:

If the fuse is blown:

  1. Disconnect the solenoid.
  2. Measure solenoid resistance.
  3. Check the supply wire for a short.
  4. Inspect other components sharing the fuse.
  5. Repair the fault.
  6. Install the correct fuse.
  7. Retest the circuit.

Step 11: Measure Solenoid Resistance

Measure resistance across the disconnected solenoid terminals.

Compare it with the manufacturer’s specification.

Possible findings include:

Do not use a generic resistance value from another engine.

Step 12: Compare Bank 1 and Bank 2

If both exhaust solenoids are identical, compare:

A significant difference may help isolate the faulty component.

Confirm matching part numbers before using Bank 1 as the reference.

Step 13: Test Each Terminal Against the Housing

When permitted by service information, measure resistance between each solenoid terminal and the solenoid body.

Unexpected continuity may indicate:

Step 14: Verify Supply Voltage

With ignition on, identify the solenoid power terminal.

Expected voltage may be:

If voltage is missing, inspect:

Step 15: Load-Test the Supply Circuit

An unloaded multimeter may show normal voltage through a heavily corroded circuit.

Perform an approved loaded test across:

Voltage that collapses under load indicates excessive resistance.

Step 16: Test the PCM Control Wire

Disconnect the PCM and solenoid as instructed.

Check the wire for:

Move the harness during testing.

Step 17: Check Terminal Tension

Use the manufacturer-approved terminal test tool.

Inspect for:

Avoid forcing oversized meter probes into the connector.

Creating the terminal fault during diagnosis is efficient, but not in a useful way.

Step 18: Perform Voltage-Drop Testing

With the circuit operating, measure voltage drop across:

Excessive voltage drop indicates unwanted resistance.

Step 19: Command the Solenoid With a Scan Tool

Use a bidirectional scan tool when supported.

Monitor:

Possible results include:

Step 20: Measure Solenoid Current

A low-current clamp may reveal:

Compare the reading with:

Step 21: Examine the PWM Waveform

An oscilloscope can display:

A waveform that does not respond correctly may indicate:

Step 22: Perform a Wiggle Test

Monitor voltage and current while moving:

Watch for:

Step 23: Inspect the Solenoid Mechanically

If the electrical circuit passes but camshaft response remains poor, remove the solenoid.

Inspect for:

Mechanical restrictions normally produce timing-performance codes, but they may exist alongside P0084.

Step 24: Compare Desired and Actual Camshaft Timing

Monitor:

Possible findings include:

Step 25: Swap Solenoids Only When Approved

If the Bank 1 and Bank 2 exhaust solenoids are confirmed identical, a controlled swap may help isolate the fault.

After swapping:

Do not swap intake and exhaust solenoids unless the manufacturer confirms they are interchangeable.

Step 26: Check Oil Pressure

If electrical testing passes but timing response remains poor, verify engine-oil pressure.

Low pressure may result from:

The camshaft actuator cannot respond properly without adequate oil pressure.

Step 27: Check PCM Power and Grounds

Before condemning the PCM, verify:

Step 28: Check Technical Service Bulletins

Search current manufacturer information using:

Possible factory corrections may include:

Step 29: Evaluate the PCM Driver

Only consider PCM failure after confirming:

If the PCM cannot control the circuit after all external tests pass, it may require:

Step 30: Verify the Repair

After completing repairs:

  1. Clear all diagnostic trouble codes.
  2. Start the engine.
  3. Confirm the oil-pressure warning light turns off normally.
  4. Monitor the Bank 2 exhaust-solenoid command.
  5. Check circuit voltage and current.
  6. Compare desired and actual exhaust-camshaft timing.
  7. Verify normal idle quality.
  8. Road-test under varied load and RPM.
  9. Complete the required drive cycle.
  10. Rescan for pending and confirmed codes.
  11. Confirm P0084 does not return.

Common Repairs and Costs

RepairEstimated Cost
Reconnect or reseat solenoid connector$0–100
Clean electrical connector$50–150
Replace connector terminals$75–250
Engine oil and filter change$60–180
Replace Bank 2 exhaust VVT solenoid$150–500
Repair open or shorted wiring$150–650
Replace solenoid connector$100–325
Replace fuse or relay after repairing fault$75–250
Repair engine power-supply circuit$150–700
Clean restricted oil passage$200–700
Replace exhaust camshaft actuator or phaser$700–2,000+
Replace timing-chain components$1,000–4,000+
Update PCM software$100–300
Replace and program PCM$1,000–2,500+

Actual costs depend on:

A loose connector may take seconds to repair.

A damaged wire beneath the intake manifold may turn those seconds into several hours and a growing pile of parts that had nothing wrong with them.

Common Diagnostic Mistakes

Avoid these common P0084 diagnostic mistakes:

P0084 is a general electrical circuit code.

The timing chain may eventually need replacement, but replacing it because one connector is corroded is an expensive disagreement with the evidence.

Vehicles Commonly Affected

P0084 is a generic OBD-II code and may appear on certain:

Manufacturer terminology may include:

The exact wiring, voltage thresholds and diagnostic procedures vary by application.

P0084 on Nissan and Infiniti Vehicles

Nissan and Infiniti may refer to the component as the:

Exhaust Valve Timing Control Solenoid Valve

Possible causes include:

A documented Nissan-related P0084 complaint identifies the code as the Bank 2 exhaust valve control solenoid circuit.

If additional timing-performance codes are stored, inspect:

P0084 on Hyundai and Kia Vehicles

Hyundai and Kia may call the component the:

Inspect:

Related Hyundai and Kia VVT circuits commonly use PCM-controlled oil-control valves and are diagnosed through circuit, resistance, supply and control-wire testing.

P0084 on Toyota and Lexus Vehicles

Toyota and Lexus may call the component the:

Possible inspection areas include:

Confirm the Bank 2 location using the exact engine family.

P0084 on Ford and Lincoln Vehicles

Ford and Lincoln may use the term:

Possible causes include:

If multiple VCT circuit codes are present, inspect the shared power source and harness.

P0084 on General Motors Vehicles

General Motors may call the component the:

Possible causes include:

If several actuator codes are stored, inspect the common ignition-voltage circuit before replacing multiple solenoids.

P0084 After Engine Repairs

If P0084 appears after:

inspect for:

A code appearing immediately after repair work should first be investigated in the area that was disturbed.

The PCM may be able to adjust cam timing continuously, but it still cannot reconnect the plug left hanging beside the valve cover.

P0084 After Replacing the VVT Solenoid

If P0084 appears after installing a new solenoid, verify:

A replacement component may still be:

Do not condemn the PCM merely because the new part arrived in a clean box.

Can Dirty Oil Cause P0084?

Dirty oil can contribute to VVT problems, but P0084 specifically directs diagnosis toward the electrical circuit.

Dirty oil may cause:

Dirty oil does not directly explain:

Check oil condition, but continue electrical diagnosis.

Can Low Oil Cause P0084?

Low oil is not normally the direct cause of the electrical circuit code.

However, low oil can cause:

Correct the oil level before active testing, but do not assume adding oil will repair damaged wiring.

Can a Bad VVT Solenoid Cause P0084?

Yes.

A failed exhaust VVT solenoid can cause P0084 if its coil is:

Measure coil resistance and compare it with the manufacturer’s specification.

Can a Bad Camshaft Sensor Cause P0084?

A camshaft position sensor is not a common direct cause of P0084.

The camshaft sensor reports position, while P0084 monitors the exhaust valve control solenoid circuit.

A failed camshaft sensor is more likely to set:

Diagnose all stored codes together.

Can a Blown Fuse Cause P0084?

Yes, depending on the circuit design.

A blown fuse may remove power from:

If several circuit codes appear together, inspect shared fuses and relays before replacing individual components.

Find the cause before installing another fuse.

A fuse is not a consumable service item. It is a circuit-protection device with strong opinions about excessive current.

How to Prevent P0084

Reduce the likelihood of P0084 by:

Frequently Asked Questions

What does P0084 mean?

P0084 means the PCM has detected an electrical malfunction in the Bank 2 exhaust valve control solenoid circuit.

What is the full definition of P0084?

The generic definition is:

Exhaust Valve Control Solenoid Circuit Bank 2

Is P0084 a circuit-low or circuit-high code?

Neither specifically.

P0084 is the general circuit-malfunction code.

Where is Bank 2?

Bank 2 is the side of the engine that does not contain cylinder number 1.

The exact side varies by engine design.

What causes P0084 most often?

Common causes include:

Is P0084 serious?

P0084 is moderately serious.

The engine may continue running, but performance, idle quality, fuel economy and emissions may be affected.

Can I drive with P0084?

Possibly for a short distance if:

Stop driving if the oil-pressure warning appears, the engine rattles, it stalls or power loss becomes severe.

Can P0084 cause rough idle?

Yes.

Loss of Bank 2 exhaust camshaft control may cause rough idle, surging, misfires or stalling.

Can P0084 cause poor acceleration?

Yes.

The engine may lose torque and throttle response if Bank 2 exhaust camshaft timing cannot be adjusted.

Can P0084 cause Bank 2 misfires?

It may contribute to Bank 2 misfires if incorrect exhaust timing affects cylinder scavenging and combustion stability.

Ignition, fuel and compression problems must still be ruled out.

Can an unplugged VVT solenoid cause P0084?

Yes.

A disconnected solenoid creates an open circuit and may store P0084 or P0086, depending on manufacturer logic.

Can broken wiring cause P0084?

Yes.

An open, grounded or shorted wire can all trigger P0084.

Can dirty oil cause P0084?

Dirty oil can contribute to hydraulic VVT problems, but electrical testing is required because P0084 is a circuit code.

What is the difference between P0078 and P0084?

P0078 affects the Bank 1 exhaust valve control solenoid circuit.

P0084 affects the Bank 2 circuit.

What is the difference between P0084 and P0085?

P0084 indicates a general circuit fault.

P0085 specifically indicates that circuit voltage is below specification.

What is the difference between P0084 and P0086?

P0084 indicates a general circuit fault.

P0086 specifically indicates that circuit voltage is above specification.

Can I test the VVT solenoid with a multimeter?

Yes.

Common tests include:

Use vehicle-specific specifications.

Can I apply battery voltage directly to the solenoid?

Only if the manufacturer’s test procedure permits it.

Incorrect polarity, continuous power or excessive current may damage the solenoid or PCM circuit.

Does a replacement VVT solenoid require programming?

Usually not.

The vehicle may require:

A replacement PCM requires programming.

How much does P0084 cost to repair?

A basic Bank 2 exhaust VVT solenoid replacement typically costs approximately $150–500.

Wiring, connector, PCM, camshaft actuator or timing-system repairs may cost substantially more.

Final Thoughts

The P0084 code means the PCM has detected a malfunction in the Bank 2 exhaust valve control solenoid circuit.

The most common causes include:

Start diagnosis by:

  1. Confirming P0084 is the general Bank 2 circuit code.
  2. Scanning for related trouble codes.
  3. Correctly identifying Bank 2.
  4. Checking engine-oil level and condition.
  5. Confirming the exhaust solenoid is connected.
  6. Inspecting connector terminals.
  7. Measuring solenoid resistance.
  8. Checking fuses and relays.
  9. Verifying supply voltage.
  10. Testing the PCM control wire.
  11. Checking for shorts to ground or voltage.
  12. Comparing Bank 1 and Bank 2 circuits.
  13. Commanding the solenoid with a bidirectional scan tool.
  14. Evaluating the PCM only after external circuit tests pass.

Do not automatically replace the camshaft actuator or timing chain.

P0084 is first and foremost an electrical circuit code. The repair may involve a failed solenoid, corroded connector, broken wire, blown fuse, failed relay or PCM driver.

Variable valve timing is a sophisticated combination of electronics, hydraulics and mechanical camshaft control.

Sometimes the entire system still stops working because one connector was not fully clicked into place—which is the sort of humble little failure that keeps expensive engineering from getting too confident.

Related Articles

Exhaust Valve Control Solenoid Codes

Related Bank 2 Camshaft Codes

Previous P-Code Articles

Browse the complete Pro Street diagnostic libraries:

Exit mobile version