Powertrain
Definition only
Lights the check engine lamp
P2A4C: Alternative Fuel Temperature Sensor Range/Performance
Standardized SAE J2012 code · P2Axx codes
What does P2A4C mean?
The alternative fuel temperature signal does not match plausibility checks against ambient and fuel-rail temperatures. Sensor drift.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Sensor characteristic drifted
- Medium Sensor mounting displaced from fluid path
- Low Sensor element aged beyond calibration window
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2A4C on the same make and model first.
P2A4C in the community
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