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P0080 Code Explained: Exhaust Valve Control Solenoid Circuit High Bank 1 Causes, Symptoms & Fixes

P0080 code displayed on an OBD-II scanner with the Bank 1 exhaust valve control solenoid, high circuit voltage, disconnected wiring, and exhaust camshaft actuator highlighted.

If your OBD-II scanner displays P0080, your vehicle’s Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a higher-than-expected electrical signal in the Bank 1 exhaust valve control solenoid circuit.

The generic OBD-II definition for P0080 is:

Exhaust Valve Control Solenoid Circuit High Bank 1

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

P0080 belongs to the Bank 1 exhaust valve control solenoid code group:

The code sequence confirms that P0080 identifies the circuit-high fault for the Bank 1 exhaust valve control solenoid.

The exhaust valve control solenoid is part of the engine’s variable valve timing system. It directs pressurized engine oil to the exhaust camshaft actuator, allowing the PCM to advance or retard exhaust camshaft timing.

P0080 is primarily an electrical code. It commonly indicates that the circuit is:

Common causes include:

Possible symptoms include:

For additional diagnostic information, visit:

P0080 Quick Facts

ItemInformation
OBD-II CodeP0080
DescriptionExhaust Valve Control Solenoid Circuit High Bank 1
CategoryPowertrain
SystemVariable Valve Timing
Main ComponentExhaust Valve Control Solenoid
Affected SideBank 1
Fault TypeHigh Circuit Voltage
Common Electrical CauseOpen Circuit or Short to Voltage
SeverityModerate
Safe to Drive?Sometimes, for a short distance
Typical Repair Cost$100–700

What Does P0080 Mean?

P0080 means the PCM has detected voltage or electrical feedback above the permitted range in the Bank 1 exhaust valve control solenoid circuit.

The affected circuit may include:

On many vehicles, the solenoid receives ignition voltage on one terminal. The PCM controls the other terminal by switching it to ground.

If the PCM commands the solenoid on but the control circuit remains near battery voltage, it may conclude that current cannot flow because of:

The PCM may then disable variable valve timing and store P0080.

Important P0078, P0079 and P0080 Code Sequence

The correct generic sequence is:

CodeDescription
P0078Exhaust Valve Control Solenoid Circuit Bank 1
P0079Exhaust Valve Control Solenoid Circuit Low Bank 1
P0080Exhaust Valve Control Solenoid Circuit High Bank 1

Therefore:

This distinction is important because the diagnostic direction changes:

Exact manufacturer circuit designs vary, so always verify the vehicle’s wiring diagram.

What Is Bank 1?

Bank 1 is the side of the engine containing cylinder number 1.

On inline engines, there is only one cylinder bank, so the entire engine is considered Bank 1.

On V-type engines, including:

Bank 1 may be located on either side.

It is not automatically:

Use the manufacturer’s cylinder-numbering diagram to identify Bank 1.

Replacing the solenoid on the wrong bank will not clear P0080, although it may provide a detailed education in removing the same engine cover twice.

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.

It may also be called:

The solenoid controls oil flowing to the exhaust camshaft actuator or cam phaser.

The PCM may adjust exhaust camshaft timing based on:

Adjusting exhaust camshaft timing can improve:

P0080 does not automatically mean the camshaft actuator has failed. It means the PCM has detected an electrical problem in the circuit controlling the exhaust solenoid.

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 logic

When the PCM requests an exhaust camshaft adjustment:

  1. It changes the solenoid duty cycle.
  2. The solenoid redirects engine oil.
  3. Oil pressure enters the camshaft actuator.
  4. The actuator rotates the camshaft relative to its sprocket.
  5. The camshaft sensor reports the new position.
  6. The PCM compares desired timing with actual timing.

If the solenoid circuit remains electrically high, the PCM may be unable to control oil flow and will often disable variable valve timing.

How the Exhaust Valve Control Solenoid Circuit Works

Many exhaust VVT solenoids have two wires:

The PCM frequently controls the ground side with pulse-width modulation.

Pulse-width modulation allows the PCM to regulate:

The PCM may monitor:

When the circuit is intact and commanded on, current flows through the solenoid coil.

When the circuit is open, the PCM may continue seeing supply voltage on the control side because no current can flow. This may trigger P0080.

What Does “Circuit High” Mean?

“Circuit high” means the PCM is detecting an electrical signal or feedback voltage above the expected range.

It does not necessarily mean:

Common circuit-high conditions include:

On a common low-side-controlled circuit, the PCM expects the control voltage to fall when it grounds the solenoid.

If the circuit stays at battery voltage, the PCM knows the electrical command did not produce the expected response.

P0080 vs P0079

CodeFaultCommon Direction
P0079Circuit lowShort to ground, shorted coil or low supply
P0080Circuit highOpen circuit, disconnected solenoid or short to voltage

The terms “low” and “high” describe electrical circuit behavior.

They do not describe:

P0080 vs P0013

P0013 is generally defined as:

“B” Camshaft Position Actuator Circuit Bank 1

P0080 is defined as:

Exhaust Valve Control Solenoid Circuit High Bank 1

Both codes may involve the Bank 1 exhaust camshaft oil-control solenoid.

The main distinction is:

Manufacturer terminology and diagnostic strategies vary, so use the service procedure written for the exact vehicle and engine.

Symptoms of P0080

Possible P0080 symptoms include:

Some vehicles disable exhaust camshaft control and hold the camshaft in a default position.

The engine may continue running but feel noticeably flatter across part of the RPM range.

The PCM has not removed all the horsepower. It has merely asked the camshaft to stop being clever.

Can P0080 Cause a Rough Idle?

Yes.

Exhaust camshaft timing affects:

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

However, rough idle can also be caused by:

Confirm that P0080 is active before blaming every idle problem on the exhaust VVT solenoid.

Can P0080 Cause Poor Acceleration?

Yes.

Exhaust camshaft timing helps optimize:

When the PCM disables exhaust VVT, the engine may feel:

The effect varies by engine design.

Common Causes of P0080

1. Disconnected Exhaust VVT Solenoid

A disconnected solenoid is one of the most common causes of P0080.

The connector may have been left unplugged during:

A disconnected solenoid prevents current flow and may leave the control circuit at a high voltage.

2. Open Solenoid Coil

The coil inside the exhaust valve control solenoid may break.

Possible causes include:

An open solenoid typically measures:

The PCM may detect no current when it commands the solenoid and store P0080.

3. Broken Control Wire

The PCM control wire may break because of:

The outer insulation may remain intact while the conductor inside is broken.

4. Control Circuit Shorted to Battery Voltage

The control wire may contact:

A short to voltage prevents the PCM from pulling the circuit low.

P0080 diagnostic testing commonly includes checking the solenoid power supply, control wire and harness for a short to power.

5. Loose Electrical Connector

A connector may look installed but fail to make reliable contact because of:

A loose connection may set P0080 intermittently or continuously.

6. Backed-Out Connector Terminal

A terminal may slide backward when the connector is installed.

Inspect for:

An apparently connected plug may still contain an electrically disconnected terminal.

7. Corroded Connector Terminals

Corrosion can create enough resistance to prevent proper current flow.

Inspect for:

8. Oil Inside the Connector

Engine oil may enter the connector through:

Oil can:

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

9. Heat-Damaged Wiring

The exhaust VVT solenoid is often mounted near hot components.

Wiring may be damaged by:

Heat can make insulation:

10. Chafed Engine Harness

The harness may rub against:

A chafed control wire may open or contact a powered circuit as the engine moves.

11. Incorrect Previous Wiring Repair

Poor repairs may include:

A wire may show battery voltage on a multimeter while still being unable to carry the required current.

12. Incorrectly Wired Replacement Pigtail

A replacement connector may have:

Always verify the pinout using a wiring diagram.

Wire colors are helpful. They are not a legally binding promise—especially after someone else has repaired the harness.

13. Failed Exhaust Valve Control Solenoid

The solenoid may fail electrically or mechanically.

Electrical failures include:

Mechanical failures include:

P0080 points toward the electrical circuit first.

14. Incorrect Replacement Solenoid

An incorrect solenoid may have:

A new component may still be:

New parts should be tested when the code appeared immediately after replacement.

15. High Circuit Resistance

Excessive resistance may be caused by:

A basic continuity test may pass even when the circuit cannot carry enough current.

Use a loaded voltage-drop test.

16. Failed Fuse or Engine-Control Relay

Circuit design determines how a missing power supply affects the stored code.

Inspect the shared:

If several actuator codes appear together, a shared power problem is more likely than several simultaneous solenoid failures.

17. Poor PCM Connection

The PCM connector may have:

Follow manufacturer procedures before disconnecting the PCM.

18. PCM Power or Ground Problem

A PCM power or ground issue may interfere with:

Inspect:

Multiple unrelated circuit codes increase the likelihood of a shared voltage or ground problem.

19. Low Engine Oil Level

Low oil does not normally create a circuit-high electrical condition directly.

However, the VVT system still depends on adequate oil for hydraulic operation.

Low oil can cause:

Always check oil level before performing active VVT tests.

20. Dirty or Sludged Engine Oil

Contaminated oil may restrict:

Dirty oil is more likely to cause timing-performance codes than P0080, but it may coexist with an electrical solenoid failure.

An oil change will not reconnect a broken wire, though it may remove one additional problem from the list.

21. Incorrect Oil Viscosity

Oil that is too thick or too thin may cause:

Use the oil viscosity and specification required by the manufacturer.

22. PCM Software Issue

A software problem may cause the PCM to:

Check for:

23. Failed PCM Driver

The PCM driver may be unable to pull the solenoid control circuit low.

Possible causes include:

Only suspect the PCM after confirming:

Replacing the PCM before checking whether the solenoid connector is attached remains an impressively expensive way to discover an unplugged component.

Is P0080 Serious?

P0080 is generally considered a moderate-severity code.

The engine may continue operating, but exhaust camshaft adjustment may be:

Possible consequences include:

P0080 becomes more serious if:

Can You Drive With P0080?

You may be able to drive a short distance if:

Avoid continued driving if:

P0080 does not usually cause immediate engine damage by itself.

Continuing to drive with low oil pressure or severe timing noise is a different and considerably more expensive decision.

How to Diagnose P0080

Step 1: Scan All Stored Codes

Check for:

Record:

Step 2: Confirm the Correct Definition

Verify that the scanner identifies P0080 as:

Exhaust Valve Control Solenoid Circuit High Bank 1

The correct sequence is P0078 general, P0079 low and P0080 high.

Step 3: Identify Bank 1

Locate:

Do not confuse:

Step 4: Check Engine Oil

Verify:

Correct any oil problem before commanding the VVT system.

Step 5: Locate the Exhaust Solenoid

The exhaust VVT solenoid may be mounted:

Use service information to identify the correct component.

Step 6: Confirm the Connector Is Attached

Check whether the connector is:

An unplugged solenoid should always be ruled out before advanced electrical testing.

Step 7: Inspect the Connector

Disconnect the connector and inspect for:

Repair connector damage before replacing the solenoid.

Step 8: Inspect the Wiring Harness

Follow the harness toward the PCM and fuse box.

Look for:

Step 9: Measure Solenoid Resistance

Measure resistance across the disconnected solenoid terminals.

Compare it with the manufacturer’s specification.

Possible findings:

Do not use a generic resistance specification from another vehicle.

Step 10: Test Each Terminal Against the Housing

When permitted by service information, test each solenoid terminal against the solenoid body.

Unexpected continuity may indicate:

Step 11: Verify Supply Voltage

With ignition on, identify the power-supply terminal.

Expected voltage may be:

If power is missing, inspect:

Step 12: Load-Test the Supply Circuit

An unloaded multimeter may show normal voltage through a corroded connection.

Perform an approved loaded test across:

Voltage that collapses under load indicates excessive resistance.

Step 13: Test the Control Wire for an Open

Disconnect the PCM and solenoid as instructed.

Measure continuity from the solenoid connector to the PCM terminal.

Check for:

Move the harness while monitoring resistance.

Step 14: Test for a Short to Voltage

With the PCM and solenoid disconnected, check whether the control wire receives voltage from another circuit.

Possible sources include:

Testing the control line for a short to power is an important part of diagnosing P0080.

Step 15: Inspect Terminal Tension

Use the manufacturer-approved terminal test tool.

Inspect for:

Avoid inserting an oversized meter probe into the connector.

That can create the loose-terminal problem you were trying to find.

Step 16: Perform Voltage-Drop Testing

With the circuit operating, measure voltage drop across:

Excessive voltage drop indicates unwanted resistance.

Step 17: Command the Solenoid With a Scan Tool

Use a bidirectional scan tool when supported.

Monitor:

Possible results include:

Step 18: Measure Solenoid Current

A low-current clamp may reveal:

Compare readings with:

Step 19: Examine the PWM Waveform

An oscilloscope can display:

A circuit that remains near battery voltage when commanded may indicate:

Step 20: Perform a Wiggle Test

Monitor voltage and current while moving:

Watch for:

Step 21: Inspect the Solenoid Mechanically

If the electrical circuit passes but VVT performance remains poor, remove the solenoid.

Inspect for:

Mechanical restrictions generally set performance codes, but they may exist alongside P0080.

Step 22: Compare Bank 1 and Bank 2

On engines with two banks, compare:

Bank 2 may provide a useful known-good reference when both systems use identical parts.

Step 23: 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 24: Check PCM Power and Grounds

Before condemning the PCM, verify:

Step 25: Check Technical Service Bulletins

Search current manufacturer information using:

Possible factory corrections may include:

Step 26: Evaluate the PCM Driver

Only consider PCM failure after confirming:

If the driver cannot pull the circuit low after all external tests pass, the PCM may require:

Step 27: 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 1 exhaust solenoid command.
  5. Check circuit voltage and current.
  6. Compare desired and actual 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 P0080 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 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 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+

Repair costs vary according to:

A disconnected solenoid may take seconds to repair.

A broken control wire routed beneath the intake manifold may turn those seconds into several billable hours and a growing collection of removed plastic parts.

Common Diagnostic Mistakes

Avoid these common P0080 diagnostic mistakes:

P0080 is an electrical circuit-high code.

Replacing the timing chain before checking the two-wire connector is not technically impossible. It is simply an unusually expensive way to avoid using a multimeter.

Vehicles Commonly Affected

P0080 is a generic OBD-II code and may appear on various vehicles, including certain:

Manufacturer terminology may include:

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

P0080 on Hyundai and Kia Vehicles

Hyundai and Kia may call the component the:

Common diagnostic checks include:

P0079 and P0080 are commonly identified as the circuit-low and circuit-high exhaust-solenoid faults on Kia applications.

P0080 on Nissan and Infiniti Vehicles

Nissan and Infiniti may refer to the component as the:

Exhaust Valve Timing Control Solenoid Valve

Possible causes include:

If additional exhaust camshaft timing-performance codes are stored, inspect:

P0080 After Engine Repairs

If P0080 appears after:

inspect for:

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

The PCM can adjust cam timing several times per second. It remains entirely incapable of reconnecting a plug left hanging beside the valve cover.

P0080 After Replacing the VVT Solenoid

If P0080 appears after installing a new solenoid, verify:

A new component may still be:

Do not condemn the PCM merely because the replacement part arrived in fresh packaging.

Can Dirty Oil Cause P0080?

Dirty oil may contribute to mechanical VVT problems, but P0080 specifically identifies a high electrical circuit condition.

Dirty oil may cause:

Dirty oil does not directly explain:

Check the oil, but continue electrical testing.

Can a Bad VVT Solenoid Cause P0080?

Yes.

An exhaust VVT solenoid can cause P0080 if its internal coil is:

Measure coil resistance and compare it with the correct manufacturer specification.

Can a Bad Camshaft Position Sensor Cause P0080?

A camshaft position sensor is not a common direct cause of P0080.

The camshaft sensor reports camshaft position, while P0080 monitors the exhaust valve control solenoid circuit.

A failed camshaft sensor is more likely to set:

Diagnose all stored codes together.

How to Prevent P0080

Reduce the likelihood of P0080 by:

Frequently Asked Questions

What does P0080 mean?

P0080 means the PCM has detected a higher-than-expected electrical signal in the Bank 1 exhaust valve control solenoid circuit.

What is the full definition of P0080?

The generic definition is:

Exhaust Valve Control Solenoid Circuit High Bank 1

Is P0080 the general exhaust valve control solenoid code?

No.

The correct sequence is:

Where is Bank 1?

Bank 1 is the side of the engine containing cylinder number 1.

Inline engines have only one bank, which is Bank 1.

What does circuit high mean?

Circuit high means the monitored voltage or driver feedback is above the PCM’s expected range.

Common causes include:

Does circuit high mean high engine-oil pressure?

No.

The word “high” refers to the electrical circuit signal, not engine-oil pressure.

What causes P0080 most often?

Common causes include:

Is P0080 serious?

P0080 is moderately serious.

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

Can I drive with P0080?

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 P0080 cause rough idle?

Yes.

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

Can P0080 cause poor acceleration?

Yes.

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

Can an unplugged VVT solenoid cause P0080?

Yes.

A disconnected solenoid can create an open circuit and leave the monitored control circuit at a high voltage.

Can broken wiring cause P0080?

Yes.

An open control wire or a control wire shorted to battery voltage can set P0080.

Can dirty oil cause P0080?

Dirty oil can contribute to hydraulic VVT problems, but P0080 requires electrical testing because it identifies a circuit-high condition.

What is the difference between P0078 and P0080?

P0078 indicates a general Bank 1 exhaust valve control solenoid circuit malfunction.

P0080 specifically indicates that the circuit signal is above the expected range.

What is the difference between P0079 and P0080?

P0079 indicates a low circuit condition.

P0080 indicates a high circuit condition.

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 testing procedure permits it.

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

Does a replacement VVT solenoid require programming?

Usually not.

The vehicle may require:

A replacement PCM requires programming.

How much does P0080 cost to repair?

A basic 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 P0080 code means the PCM has detected a high electrical condition in the Bank 1 exhaust valve control solenoid circuit.

The most common causes include:

Start diagnosis by:

  1. Confirming P0080 is the circuit-high code.
  2. Scanning for related trouble codes.
  3. Correctly identifying Bank 1.
  4. Checking engine oil level and condition.
  5. Confirming the exhaust solenoid is connected.
  6. Inspecting connector terminals.
  7. Measuring solenoid resistance.
  8. Verifying supply voltage.
  9. Testing control-wire continuity.
  10. Checking for a short to battery voltage.
  11. Commanding the solenoid with a bidirectional scan tool.
  12. Evaluating the PCM only after external circuit tests pass.

Do not interpret “circuit high” as high oil pressure or an over-advanced camshaft.

P0080 means the electrical circuit remains above the voltage the PCM expects. On many systems, that points toward an open solenoid, disconnected connector, broken control wire or unwanted battery voltage.

The repair may be as simple as reconnecting one plug.

It may also require following one damaged wire through an engine harness routed beneath enough plastic covers to suggest that the manufacturer was trying to hide it from future generations.

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