Powertrain
Enriched, not yet reviewed
Lights the check engine lamp
P2D2C: Engine Coolant Temperature Measurement System - Multiple Sensor Correlation
Standardized SAE J2012 code · P2Dxx codes
What does P2D2C mean?
The signals of multiple engine coolant temperature sensors do not correlate within the calibrated tolerance. One sensor drifts or installation offset between channels.
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 One sensor characteristic drifted
- Medium Harness incorrectly swapped between channels
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2D2C on the same make and model first.
P2D2C in the community
Ask about P2D2CNo one has posted about P2D2C yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P2D2C problem