Powertrain
Definition only
Lights the check engine lamp
P2AFD: Engine Coolant Temperature Sensor 4 Range/Performance
Standardized SAE J2012 code · P2Axx codes
What does P2AFD mean?
The engine coolant temperature 4 signal does not match plausibility checks against related signals. Sensor drift.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Common causes
- High Sensor characteristic drifted
- Medium Sensor mounting displaced from reference 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 P2AFD on the same make and model first.
P2AFD in the community
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