Powertrain
Definition only
Lights the check engine lamp
P2C51: Fuel Level Sensor A/B Correlation
Standardized SAE J2012 code · P2Cxx codes
What does P2C51 mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High One float stuck on guide rod
- Medium Saddle tank transfer pump failed
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2C51 on the same make and model first.
P2C51 in the community
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