OBD-II code · Powertrain (generic, extended)
P2D2C Engine Coolant Temperature Measurement System - Multiple Sensor Correlation
The signals of multiple engine coolant temperature sensors do not correlate within the calibrated tolerance. One sensor drifts or installation offset between channels.
Is it safe to drive with P2D2C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor characteristic drifted
- PossibleHarness incorrectly swapped between channels
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
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Engine Coolant Temperature Sensor 1, Engine Coolant Temperature Sensor 2, Ecm
Related codes
- P2D29A/C Compressor Motor Stalled
- P2D2AHybrid/EV Electronics Coolant Temperature Sensor A/B Correlation
- P2D2BHybrid/EV Battery Pack Coolant Temperature Sensor A/B Correlation
- P2D2DCold Start Intake Manifold Runner Performance Bank 1
- P2D2ECold Start Intake Manifold Runner Performance Bank 2
- P2D2FCold Start Turbocharger/Supercharger A Underboost
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.