OBD-II code · Powertrain (generic)
P052B Cold Start A Camshaft Position Timing Over-Retarded Bank 1
Same as P052A with the phaser stuck retarded - cold-start strategy cannot pull the cam to the advanced position needed for fast catalyst light-off.
Is it safe to drive with P052B?
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 A B1, Oil Supply
Related codes
- P052DCold Start A Camshaft Position Timing Over-Retarded Bank 2
- P054BCold Start B Camshaft Position Timing Over-Retarded Bank 1
- P054DCold Start B Camshaft Position Timing Over-Retarded Bank 2
- P0528Fan Speed Sensor Circuit No Signal
- P0529Fan Speed Sensor Circuit Intermittent
- P052ACold Start A Camshaft Position Timing Over-Advanced Bank 1
- P052CCold Start A Camshaft Position Timing Over-Advanced Bank 2
- P052EPCV Regulator Valve Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.