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P0367 Code Explained: Camshaft Position Sensor B Circuit Low Input Bank 1

P0367 code camshaft position sensor B circuit low input Bank 1

If your OBD-II scanner displays P0367, the engine computer has detected an abnormally low electrical signal from the Camshaft Position Sensor “B” on Bank 1.

Unlike a range/performance code, P0367 specifically indicates that the sensor circuit voltage or signal is lower than the expected threshold.

That makes the diagnostic process somewhat different.

The problem may involve the sensor itself, its power supply, ground circuit, signal wiring, connector, or another electrical condition pulling the signal too low.

What Does P0367 Mean?

P0367 — Camshaft Position Sensor “B” Circuit Low Input Bank 1

The engine control module (ECM) or powertrain control module (PCM) monitors the camshaft position signal while the engine is operating.

When the signal from Sensor B on Bank 1 drops below the manufacturer’s calibrated threshold, the computer can store P0367 and illuminate the Check Engine Light.

The key words are:

P0367 is therefore primarily an electrical signal-level diagnostic code.

It does not automatically mean the camshaft itself has a mechanical problem.

What Is Camshaft Position Sensor B?

Many engines use multiple camshaft position sensors.

On engines with separate intake and exhaust camshafts, manufacturers commonly designate one as Sensor A and the other as Sensor B.

Sensor B is often associated with the exhaust camshaft, although terminology varies between manufacturers.

Always verify the specific sensor designation for the vehicle being diagnosed.

The camshaft position sensor provides the ECM with information about camshaft position and rotation.

That information helps the computer coordinate engine operation, including:

What Is Bank 1?

Bank 1 is the side of a multi-bank engine containing cylinder number one.

On V6 and V8 engines, the engine has two cylinder banks.

Bank 1 contains cylinder number one, while Bank 2 is the opposite bank.

Do not assume Bank 1 is always the driver’s side or passenger side.

The physical location varies by engine design.

What Does “Low Input” Mean?

The phrase low input is the important part of P0367.

The ECM expects the camshaft sensor circuit to produce a signal within a particular electrical range.

If the signal falls below the expected threshold, the ECM can interpret that as a low-input condition.

Possible reasons include:

A low-input code therefore requires electrical testing, not simply a visual inspection.

P0367 Symptoms

The symptoms associated with P0367 depend on the vehicle and the severity of the electrical fault.

Possible symptoms include:

Some vehicles may continue to run normally while the code is stored.

Others may have significant drivability problems if the ECM loses reliable camshaft position information.

Is P0367 Serious?

P0367 should be diagnosed promptly.

A low camshaft-position signal can interfere with engine synchronization and fuel or ignition control.

The seriousness depends on what caused the low signal.

A damaged connector may be a relatively simple repair.

A shorted harness or failed sensor can require more extensive diagnosis.

If the vehicle is stalling, difficult to start, experiencing severe misfires, or losing substantial power, avoid unnecessary driving until the problem has been diagnosed.

Common Causes of P0367

1. Failed Camshaft Position Sensor

The sensor itself may have an internal electrical failure that causes its output signal to remain below the expected level.

Heat and vibration can make an intermittent sensor failure particularly difficult to reproduce.

2. Short to Ground

A shorted signal wire can pull the camshaft sensor output down.

Inspect the harness carefully for:

3. Damaged Sensor Wiring

An open, partially broken or high-resistance wire can prevent the sensor from receiving the correct electrical conditions.

The wiring should be tested rather than judged solely by appearance.

4. Poor Sensor Ground

A compromised ground connection can alter the sensor’s electrical output.

Check the sensor ground circuit according to the manufacturer’s wiring diagram and specifications.

5. Missing Reference Voltage

Many electronic camshaft sensors receive a reference voltage from the ECM.

If that voltage is missing or significantly below specification, the sensor may be unable to produce the expected output.

6. Corroded Connector

Corrosion can increase resistance or interfere with terminal contact.

Look for:

7. Damaged Sensor Connector

A connector that doesn’t securely hold the terminals can cause intermittent or low signal conditions.

8. Harness Routing Problems

A harness routed too close to exhaust components can suffer heat damage.

Engine movement can also pull on wiring that has insufficient slack.

9. Electrical Interference

Poor wiring repairs or damaged shielding can introduce electrical problems into sensitive position-sensor circuits.

10. ECM/PCM Fault

A control-module problem is possible, although it should generally be considered after the sensor and circuit have been properly tested.

How to Diagnose P0367

The best way to approach P0367 is to determine why the signal is low.

Don’t start by replacing parts.

Step 1: Confirm P0367

Connect a capable OBD-II scan tool and verify the stored code.

Record:

If other codes are present, record those as well.

Multiple sensor or voltage-related codes can provide an important clue.

Step 2: Inspect the Sensor

Locate Bank 1 Sensor B using vehicle-specific service information.

Inspect the sensor for:

A visual inspection won’t prove that the sensor works, but it can reveal obvious problems.

Step 3: Inspect the Connector

Disconnect the connector and examine each terminal.

Look for:

Terminal tension matters.

A connector can look perfectly clean while failing to maintain adequate electrical contact.

Step 4: Check Sensor Power

Use the manufacturer’s wiring diagram to identify the sensor power circuit.

Verify that the required voltage is present under the conditions specified by the manufacturer.

Do not assume every camshaft sensor uses the same circuit configuration.

Step 5: Check the Ground Circuit

Verify sensor ground integrity.

An excessive voltage drop in the ground circuit can cause an electronic sensor to produce an incorrect signal.

Ground testing is more useful than simply checking continuity with the ignition switched off.

Step 6: Test the Signal Circuit

Check the sensor output using the manufacturer’s specified procedure.

Depending on the sensor design, testing may involve:

The exact test depends on the sensor technology used by the vehicle.

Step 7: Check for a Short to Ground

If the signal is too low, inspect the signal circuit for an unwanted connection to ground.

A short can occur:

Repair the circuit before replacing the sensor.

Step 8: Check the Reference Voltage

If the sensor requires a reference voltage, verify that the supply is correct.

A missing reference voltage may affect more than one sensor.

If multiple sensors report electrical faults simultaneously, investigate the shared reference circuit before replacing individual sensors.

Step 9: Monitor the Signal With an Oscilloscope

For difficult intermittent problems, an oscilloscope can provide significantly more information than a basic voltage check.

Look for:

This can help determine whether the problem originates at the sensor or elsewhere in the circuit.

Step 10: Inspect the Camshaft Trigger

If the electrical circuit checks out but the signal remains abnormal, inspect the camshaft trigger or reluctor system.

A damaged or incorrectly positioned trigger can produce an abnormal sensor signal.

Mechanical timing and VVT operation may also need to be investigated if the sensor waveform doesn’t match expected engine position.

P0367 vs. Other P036x Codes

The P036x family contains several related camshaft position sensor circuit faults.

Understanding the distinction helps prevent replacing the wrong component.

P0365

Camshaft Position Sensor “B” Circuit Bank 1

This identifies a general circuit problem.

P0366

Camshaft Position Sensor “B” Circuit Range/Performance Bank 1

The signal is present but does not operate within the expected range or performance characteristics.

P0367

Camshaft Position Sensor “B” Circuit Low Input Bank 1

The signal is below the expected electrical threshold.

P0368

Camshaft Position Sensor “B” Circuit High Input Bank 1

The signal is above the expected electrical threshold.

P0369

Camshaft Position Sensor “B” Circuit Intermittent Bank 1

The signal becomes unreliable or disappears intermittently.

The distinction between these codes is important.

P0367 specifically points toward a low electrical signal condition.

P0367 vs. P0340

P0340 and P0367 should not be treated as interchangeable codes.

P0340 concerns a Camshaft Position Sensor A circuit malfunction, while P0367 specifically identifies a low-input condition involving Sensor B on Bank 1.

That difference changes the diagnostic direction.

For P0367, checking:

should be high on the diagnostic list.

For additional camshaft-position troubleshooting, see the existing P0340 DTC Doctor guide.

Can You Drive With P0367?

It depends on how the engine is operating.

If the engine starts normally and drives without significant symptoms, limited driving may be possible while arranging diagnosis.

However, avoid unnecessary driving if the vehicle has:

A loss of reliable camshaft position information can affect how the ECM controls the engine.

How Much Does It Cost to Fix P0367?

The cost depends on the underlying electrical fault.

Possible repairs include:

A connector or wiring repair can be relatively inexpensive.

A difficult harness repair or engine timing-related repair can cost considerably more.

The important thing is to diagnose the circuit before buying parts.

Common P0367 Diagnostic Mistakes

Replacing the Sensor Without Testing the Circuit

P0367 identifies a low signal.

That does not automatically prove the sensor has failed.

Ignoring the Ground

A poor ground can create an electrical signal problem that looks like a bad sensor.

Forgetting to Check for a Short to Ground

A shorted signal circuit is an important possibility when the ECM sees an abnormally low input.

Checking Voltage Without Checking the Circuit Under Load

A circuit can show acceptable voltage with little or no load and still have a problem under operating conditions.

Ignoring Related Codes

Additional voltage, sensor or reference-circuit codes may reveal a shared electrical problem.

Assuming Every Camshaft Sensor Works the Same Way

Sensor construction and circuit design vary between manufacturers.

Always use the correct vehicle-specific service information.

Frequently Asked Questions About P0367

What does P0367 mean?

P0367 means the ECM or PCM has detected a low electrical input from Camshaft Position Sensor B on Bank 1.

Is P0367 a bad sensor?

Not necessarily.

The problem can be caused by the sensor, wiring, connector, power supply, ground, signal circuit or another electrical fault.

What is Sensor B?

Sensor B commonly refers to the exhaust camshaft on engines with separate intake and exhaust camshafts, but the exact designation varies by manufacturer.

What is Bank 1?

Bank 1 is the cylinder bank containing cylinder number one.

What causes a low camshaft sensor signal?

Common causes include a failed sensor, shorted signal wire, poor ground, missing reference voltage, damaged connector or wiring problem.

Can P0367 cause a no-start?

Yes. If the ECM cannot obtain reliable camshaft position information, starting and engine synchronization can be affected.

Can P0367 cause rough idle?

Yes. An unreliable camshaft position signal can interfere with engine control strategies and may result in rough running.

Can P0367 cause a Check Engine Light?

Yes. P0367 is an OBD-II powertrain diagnostic trouble code and can trigger the Check Engine Light.

Should I replace the camshaft sensor first?

No. Test the circuit first.

Because P0367 specifically identifies a low-input condition, verify the sensor’s power, ground and signal circuits before replacing the component.

Can a bad connector cause P0367?

Yes. Corroded, loose or damaged terminals can reduce or interrupt the electrical signal.

Final Thoughts

P0367 — Camshaft Position Sensor “B” Circuit Low Input Bank 1 is an electrical signal code that deserves electrical diagnosis.

The code tells you that the ECM sees a signal that is too low. It doesn’t tell you that the sensor itself is definitely bad.

Start with:

  1. The sensor connector
  2. Power supply
  3. Ground
  4. Signal circuit
  5. Short-to-ground testing
  6. Wiring condition
  7. Signal waveform

If those checks don’t identify the problem, investigate the camshaft trigger, mechanical timing and related engine-management systems.

And remember: a diagnostic code is a clue, not a parts-shopping list.

Related DTC Doctor Resources

For broader Powertrain diagnostic coverage, visit the Pro Street Online P-Code OBD-II DTC guide.

For the related Sensor A circuit diagnostic, see the P0340 Camshaft Position Sensor A guide.

For the related crankshaft position circuit diagnostic, see the P0335 DTC Doctor guide.

For automotive parts, tools and performance products, visit Pro Street Online.

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