P0013 — B Camshaft Position Actuator Circuit (Bank 1)
Moderate severityWhat it means
P0013 is stored when the engine control unit sees a fault involving the “B” (typically exhaust) camshaft timing/actuator on bank 1. Variable valve timing rotates the camshaft to optimise power and economy across the rev range; the control unit drives an oil-control valve and watches the resulting cam angle. The control unit has flagged this circuit or signal as outside its normal operating range.
Common symptoms
- Rough idle or a start-up rattle
- Loss of power or poor economy
- Hesitation at certain RPM
Likely causes
- A wiring, connector or ground problem in the circuit
- A failed sensor or actuator in the circuit
- A clogged oil-control valve or dirty/low oil
- A worn camshaft phaser or timing-chain stretch
What to check first
- Inspect the connector and wiring for damage, corrosion or loose pins
- Check oil level and condition first
- Inspect the oil-control valve and its connector
Can you keep driving?
Often drivable, but timing faults hurt power and economy and can stress the chain — diagnose soon.
Frequently asked questions
What is the most common cause of P0013?
The most likely cause is: A wiring, connector or ground problem in the circuit. Several other faults can set P0013 as well, so confirm the real cause with live data and the checks above before replacing any parts.
Can I just clear P0013 and keep driving?
Clearing P0013 with an OBD2 scanner turns the warning light off, but if the underlying fault has not been repaired the code will usually come back within a few drive cycles. Fix the cause first, then clear the code to confirm the repair worked.
How serious is P0013?
P0013 is a moderate-severity code. The car is often still drivable, but have it diagnosed soon — the underlying problem can get worse and it may fail an emissions test.
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