OBD-II code · Powertrain (generic)
P054B Cold Start B Camshaft Position Timing Over-Retarded Bank 1
Same as P052B on the B camshaft of bank 1. The camshaft position sensor identifies which cylinder is on the compression stroke — without it the ECM cannot run sequential injection or coil-on-plug ignition correctly.
Is it safe to drive with P054B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPhaser stuck in retarded position
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–5 h
- Emissions test
- Likely to fail
- Parts involved
- Cam Phaser B B1, Oil Supply
Related codes
- P052BCold Start A Camshaft Position Timing Over-Retarded Bank 1
- P052DCold Start A Camshaft Position Timing Over-Retarded Bank 2
- P054DCold Start B Camshaft Position Timing Over-Retarded Bank 2
- P0548Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1
- P0549Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
- P054ACold Start B Camshaft Position Timing Over-Advanced Bank 1
- P054CCold Start B Camshaft Position Timing Over-Advanced Bank 2
- P054EIdle Control System Fuel Quantity Lower Than Expected
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.