Powertrain
generic / SAE
P051C
Crankcase Pressure Sensor A Circuit Low
Same as P051A with the signal voltage below the plausible range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 1C
Possible causes
- Signal shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–280 €
- Estimated time: 0.5–1.4 h
- Component: crankcase pressure sensor a
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012