Powertrain
generic / SAE
P24AC
EGR Cooler Coolant Pump Feedback Circuit Low
The feedback line that confirms pump speed reads below the plausible range - either pump not turning or feedback line shorted to ground.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / AC
Possible causes
- Feedback line shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
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: 200–800 €
- Estimated time: 1–3 h
- Component: egr cooler coolant pump
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012