P0367 Camshaft Position Sensor "B" Circuit Low Input (Bank 1)

The P0367 diagnostic trouble code means the engine control module (ECM/PCM) has detected a lower-than-expected electrical signal from Camshaft Position Sensor "B" on Bank 1.

The important detail is the word “Low.” This code describes an electrical signal problem detected by the control module. It does not automatically mean that the camshaft itself is turning too slowly, that the engine has low compression, or that the camshaft sensor must be replaced.

The actual cause can be the sensor, wiring, connector, power supply, ground, signal circuit, camshaft trigger mechanism, or—in some cases—an underlying mechanical timing problem.

What Does Camshaft Position Sensor "B" Do?

The camshaft position sensor tells the ECM where the camshaft is positioned in relation to engine operation.

The engine needs accurate camshaft position information to coordinate several functions, including:

• Fuel injection timing

• Ignition timing

• Variable valve timing (VVT)

• Camshaft-to-crankshaft synchronization

• Misfire detection

• Engine starting

• Emissions control

Modern engines rely heavily on accurate synchronization between the crankshaft position sensor and camshaft position sensors.

A problem with one camshaft signal can therefore affect much more than simply the sensor itself.

What Does "Sensor B" Mean?

“Sensor B” is a designation used by the OBD-II system, but its exact physical location depends on the engine manufacturer.

On some engines, Sensor B may correspond to the camshaft associated with the exhaust valve timing, while another sensor may be designated Sensor A. However, this is not universal.

Therefore, you should not assume that Camshaft Position Sensor B is always the exhaust camshaft sensor.

The vehicle's wiring diagram and manufacturer service information should be used to identify the correct sensor.

What Does "Bank 1" Mean?

Bank 1 refers to the cylinder bank containing cylinder number 1.

On an inline four-cylinder or inline six-cylinder engine, there is normally only one cylinder bank, so the engine is considered Bank 1.

On V6, V8 and other engines with multiple cylinder banks, Bank 1 and Bank 2 identify the two sides of the engine.

Consequently, P0367 should be diagnosed specifically on the Camshaft Position Sensor B circuit belonging to Bank 1.

What Does "Low Input" Actually Mean?

“Low Input” refers primarily to the electrical signal being detected by the ECM.

It does not necessarily mean:

• The camshaft is rotating slowly

• Engine RPM is too low

• Oil pressure is low

• The camshaft has physically stopped

• The engine temperature is low

The ECM expects the camshaft sensor to produce a particular electrical signal. If that signal remains below the expected level, drops excessively, or otherwise fails to reach the expected electrical threshold, P0367 may be stored.

Depending on the sensor design, a low signal can be caused by a short to ground, loss of power, wiring problems, a sensor fault, an incorrect waveform, or problems with the trigger mechanism.

Common Causes of P0367

Several different faults can produce this code.

Faulty camshaft position sensor

The sensor itself may have an internal electrical problem. A sensor can degrade with age, heat, vibration, or contamination.

Short to ground in the signal circuit

A damaged wire touching the engine, chassis, or another grounded component can pull the signal voltage down.

Damaged wiring

The wiring may be broken, partially broken, crushed, rubbed through, or damaged near the sensor connector.

A wire does not always have to be completely broken to create P0367. High resistance or an intermittent connection can also distort the signal.

Poor electrical connection

Loose terminals, corrosion, moisture, oil contamination, or damaged connector pins can interfere with the sensor signal.

Power supply problem

Some camshaft sensors require a dedicated power supply. If that supply is missing or incorrect, the sensor may be unable to generate the expected signal.

Ground problem

A poor sensor ground can alter the electrical signal and cause the ECM to interpret the circuit as too low.

Incorrect sensor installation

An improperly installed sensor, incorrect sensor position, damaged mounting surface, or incorrect air gap can affect the signal.

Damaged camshaft reluctor or trigger wheel

The sensor reads a physical feature on the camshaft or another rotating component. A damaged, loose, distorted, or incorrectly positioned trigger can produce an abnormal signal.

Variable valve timing problem

VVT systems can alter camshaft position. Problems with VVT solenoids, oil passages, oil pressure, camshaft actuators, or incorrect camshaft positioning can create synchronization problems that sometimes accompany camshaft sensor codes.

Mechanical timing problem

A stretched timing chain, worn timing components, incorrect timing installation, or a camshaft timing problem can cause the actual camshaft position to differ from what the ECM expects.

Engine control module fault

An ECM/PCM problem is possible, but it should generally be considered only after the sensor, wiring, power, ground, signal, trigger mechanism, and mechanical timing have been properly tested.

Symptoms You May Notice

The symptoms associated with P0367 can vary considerably between vehicles.

Possible symptoms include:

• Check Engine Light

• Difficult starting

• Extended cranking

• Intermittent no-start

• Rough idle

• Engine hesitation

• Poor acceleration

• Reduced engine power

• Engine misfires

• Stalling

• Unstable engine operation

• Poor fuel economy

• Reduced throttle response

• Variable valve timing problems

• Limp-home mode

Some vehicles may continue to operate relatively normally despite storing P0367.

Other engines may have serious starting or synchronization problems because the ECM depends heavily on the camshaft signal.

Can P0367 Cause a No-Start?

Yes, it can.

The effect depends on the engine's control strategy.

Some engines can continue operating using the crankshaft position signal and substitute strategies when a camshaft signal is missing or incorrect. Others depend much more heavily on camshaft information for fuel injection and synchronization.

If the ECM cannot establish reliable camshaft-to-crankshaft synchronization, starting may become difficult or impossible.

An intermittent P0367 can also produce a particularly confusing situation where the engine starts normally sometimes but cranks for a long time or fails to start at other times.

Why You Should Not Immediately Replace the Sensor

Replacing the camshaft sensor is tempting because the code specifically mentions the sensor circuit.

However, P0367 is a circuit diagnostic code, not a direct declaration that the sensor is defective.

For example, imagine the sensor is receiving the correct power and ground but its signal wire is shorted to ground. Replacing the sensor will not repair the short.

Likewise, if the connector has a loose terminal, installing a new sensor may temporarily change the symptoms without actually fixing the underlying problem.

The diagnostic process should establish whether the sensor is receiving the correct electrical conditions and producing the correct signal.

How P0367 Should Be Diagnosed

A systematic diagnosis is much more effective than replacing components one at a time.

Start with a complete diagnostic scan

Scan all available control modules rather than looking only at P0367.

Other codes involving the crankshaft position sensor, camshaft sensors, VVT, engine synchronization, or power supply can provide important clues.

Check the freeze-frame data

If freeze-frame information is available, look at engine RPM, coolant temperature, vehicle speed, battery voltage and other parameters recorded when the fault occurred.

This can help determine whether P0367 appears during starting, cold operation, high RPM, or normal driving.

Identify the exact Sensor B

Confirm which physical camshaft sensor the manufacturer calls Sensor B on Bank 1.

Do not rely solely on generic sensor-location diagrams because manufacturers can use different naming conventions.

Inspect the sensor and connector

Look carefully for:

• Broken connector locks

• Bent terminals

• Corrosion

• Oil contamination

• Water intrusion

• Loose pins

• Damaged insulation

• Chafed wiring

• Wiring stretched tightly against another component

Pay particular attention to areas where the harness passes close to the cylinder head, timing cover, exhaust components, or moving engine parts.

Check power and ground

If the sensor requires an external power supply, verify that the correct supply reaches the sensor.

The ground should also be tested under appropriate conditions.

A ground that looks good with no load may still produce a voltage-drop problem when the circuit is operating.

The correct voltage and resistance values should always come from the specific vehicle's service information. There is no single universal specification that applies to every camshaft sensor.

Test the signal circuit

The sensor signal should be checked according to the sensor design.

Some sensors are Hall-effect or other active electronic sensors, while others use variable-reluctance principles. Their electrical behavior is different.

For this reason, simply measuring resistance across every camshaft sensor is not a reliable universal diagnostic method.

Use an oscilloscope when necessary

An oscilloscope can be extremely useful for P0367.

Instead of seeing only a generic voltage value, the technician can observe the actual camshaft sensor waveform.

The waveform can reveal:

• Low signal amplitude

• Missing transitions

• Distorted pulses

• Electrical noise

• Intermittent dropouts

• Incorrect signal pattern

• Timing irregularities

This is particularly valuable when the sensor appears electrically normal with a basic multimeter but the signal becomes abnormal while the engine is running.

Check the Trigger Mechanism

The sensor needs something to detect.

Depending on the engine, this may be a reluctor wheel, tone wheel, camshaft target, magnetic feature, or another timing reference.

If that trigger is damaged, loose, contaminated, incorrectly positioned, or mechanically displaced, the sensor may produce an incorrect waveform.

This is one reason a new sensor may fail to solve P0367.

Check Camshaft and Crankshaft Synchronization

If the electrical circuit appears healthy, compare the camshaft and crankshaft signals.

The ECM needs these signals to have a predictable relationship.

A timing chain that has jumped a tooth, a damaged timing component, an incorrectly installed camshaft, or a VVT system that is not controlling camshaft position correctly can create synchronization problems.

If P0367 appears together with codes related to cam/crank correlation, VVT, timing, or the crankshaft position sensor, mechanical and synchronization checks become especially important.

Oil and Variable Valve Timing Problems

On engines equipped with variable valve timing, engine oil can indirectly influence camshaft-related diagnostic codes.

VVT actuators and control valves often depend on engine oil pressure to change camshaft position.

Problems such as:

• Incorrect oil level

• Incorrect oil viscosity

• Severely degraded oil

• Restricted oil passages

• VVT solenoid problems

• Camshaft actuator problems

• Low oil pressure

can interfere with camshaft positioning.

However, these conditions should not automatically be blamed for P0367. The electrical signal circuit should still be tested properly.

P0367 vs. Other Camshaft Sensor Codes

P0367 specifically indicates a low input condition on Camshaft Position Sensor B, Bank 1.

Related codes can describe different conditions.

P0365 generally identifies a malfunction in the Camshaft Position Sensor B circuit on Bank 1.

P0366 indicates a range/performance problem with the same sensor circuit.

P0368 indicates a high-input condition.

P0369 indicates an intermittent condition.

These distinctions are useful because they can point toward different diagnostic directions. For example, a low-input code may make a signal short to ground particularly important to investigate, while an intermittent code may place more emphasis on loose connections, harness movement, heat-related faults, or vibration.

Is It Safe to Drive With P0367?

It depends on the symptoms.

If the engine starts easily, runs smoothly, does not stall, and has normal power, a short trip to a repair facility may be possible.

However, P0367 should not be ignored indefinitely.

Driving should be avoided if the engine is:

• Stalling

• Misfiring severely

• Losing significant power

• Difficult to restart

• Entering limp mode

• Showing unstable RPM

• Experiencing repeated no-start conditions

A camshaft synchronization problem can become unpredictable, particularly when the fault is intermittent.

A Practical Diagnostic Order

A sensible troubleshooting sequence is:

P0367 → scan all modules → check freeze-frame data → identify Sensor B → inspect sensor and connector → inspect wiring → verify power and ground → test signal circuit → observe waveform → inspect trigger mechanism → check cam/crank synchronization → evaluate VVT → inspect mechanical timing if necessary → repair → clear codes → road test → rescan

This approach prevents unnecessary replacement of the camshaft sensor or ECM.

Final Takeaway

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

The sensor may be faulty, but it is only one possibility. A shorted signal wire, poor connector, missing power supply, bad ground, damaged trigger mechanism, incorrect sensor installation, VVT problem, or mechanical timing issue can produce similar symptoms.

The most reliable diagnosis is based on the actual electrical circuit and sensor waveform, followed by synchronization and mechanical checks when necessary. A new sensor should be installed only when testing shows that the sensor itself is the source of the problem.