OBD-II code · Powertrain (generic, extended)
P2AFD Engine Coolant Temperature Sensor 4 Range/Performance
The engine coolant temperature 4 signal does not match plausibility checks against related signals. Sensor drift.
Is it safe to drive with P2AFD?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor characteristic drifted
- PossibleSensor mounting displaced from reference path
- Less likelySensor element aged beyond calibration window
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
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Engine Coolant Temperature Sensor 4, Wiring Harness, Ecm
Related codes
- P2B2CEngine Coolant Temperature Sensor 5 Range/Performance
- P2BB7Engine Coolant Temperature Sensor 6 Range/Performance
- P2AFAStarter Relay D Stuck On
- P2AFBStarter Relay D Stuck Off
- P2AFCEngine Coolant Temperature Sensor 4 Circuit
- P2AFEEngine Coolant Temperature Sensor 4 Circuit Low
- P2AFFEngine Coolant Temperature Sensor 4 Circuit High
- P2B00Cylinder 1 Injection Pulse Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.