Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / F2
Possible causes
- One sensor drifting outside tolerance high
- Residual heat in the charge-air cooler after a hot soak medium
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–400 €
- Estimated time: 0.5–1.5 h
- Component: egr temperature sensor
- Component: cac outlet temperature sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012