OBD-II code · Powertrain (generic)
P053A PCV Heater A Control Circuit Open
The heater on PCV path A - used to prevent ice plugs in the crankcase ventilation hose during cold weather - has an open control circuit. Without it, condensation can freeze and block PCV flow, raising crankcase pressure dangerously.
Is it safe to drive with P053A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in harness or heater element
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.4 h
- Emissions test
- Likely to fail
- Parts involved
- Pcv Heater A, Pcv Heater Wiring A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.