OBD-II code · Powertrain (generic, extended)
P2C51 Fuel Level Sensor A/B Correlation
The signals of fuel level sensors A and B do not correlate within the calibrated tolerance. Common in saddle tanks where two sensors monitor each tank half.
Is it safe to drive with P2C51?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne float stuck on guide rod
- PossibleSaddle tank transfer pump failed
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Level Sensor A, Fuel Level Sensor B, Ecm
Related codes
- P2C4EClutch Actuator Position Sensor Circuit Intermittent/Erratic
- P2C4FClutch Actuator Performance
- P2C50Clutch Pedal Position Sensor A/Clutch Actuator Position Sensor Correlation
- P2C52Cylinder 1 Fuel Injector B Offset Learning At Min Limit
- P2C53Cylinder 1 Fuel Injector B Offset Learning At Max Limit
- P2C54Cylinder 2 Fuel Injector B Offset Learning At Min Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.