OBD-II code · Powertrain (generic, extended)
P24F2 EGR Temperature/Charge Air Cooler Temperature Correlation
After a long key-off soak both the EGR temperature sensor and the charge-air cooler outlet temperature sensor must read approximately the same ambient temperature. The ECM compares them and detects an implausible delta. One of the sensors drifts, is wired wrong, or is exposed to a heat source the model does not know about.
Is it safe to drive with P24F2?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor drifting outside tolerance
- PossibleResidual heat in the charge-air cooler after a hot soak
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Temperature Sensor, Cac Outlet Temperature Sensor
Related codes
- P24EFControl Module Wake-up Circuit/Open
- P24F0Control Module Wake-up Circuit Low
- P24F1Control Module Wake-up Circuit High
- P24F3Reductant Tank Temperature/Fuel Temperature Correlation
- P24F4NOx Sensor Delayed Response - High to Low Bank 1 Sensor 1
- P24F5NOx Sensor Delayed Response - High to Low Bank 1 Sensor 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.