B Camshaft Position 'B' Timing Over-Advanced or System Performance Problem (Bank 2)
The camshaft timing on bank 2 is advancing too far, affecting engine performance.
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What it means (plain English)
The computer controls the camshaft timing to optimize engine performance. If it's set to advance too much, it can cause power loss and increased emissions. This should be between 0-10 degrees, and anything over is a signal something's wrong.
What the computer is actually seeing
The engine control module (ECM) expects the bank 2 camshaft to be within a certain timing range but sees that it’s advancing more than 10 degrees from the target position.
What a healthy reading looks like
Camshaft angle should be within ±3 degrees of the desired angle; exceeding 10 degrees triggers the code.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check oil level and condition; ensure it's at the correct level and not thick or dirty. If low or dirty, replace the oil and clear code.
- 22. Inspect the wiring and connector to the VVT solenoid for signs of damage or corrosion. Repair or replace if necessary and retest.
- 33. Measure the camshaft position sensor’s voltage while the engine runs; it should be between 0.5V and 4.5V. If readings are out of range, replace the sensor.
- 44. Verify the operation of the VVT system using a scan tool to monitor camshaft timing while revving the engine. If abnormal, replace the VVT solenoid or consider camshaft assembly issues.
Common causes
- Faulty variable valve timing (VVT) solenoid
- Mechanical binding in the camshaft assembly
- Oil flow issues causing VVT malfunction
- Wiring issues in the camshaft position sensor circuit
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but you may notice reduced power and increased emissions; fix soon.
Will this code come back after repairs?
If all issues are fixed properly, the code should not return.
Why does it pair with other codes?
This code can be a symptom of a broader issue with the camshaft timing system, often revealing related problems.
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