P24A7EGR Cooler Coolant Pump Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Some diesel engines feed the EGR cooler with an electric auxiliary coolant pump so the cooler gets flow at low engine speed or after shut-off, independent of the main pump. P24A7 means the engine controller sees an open or otherwise faulty control line to this pump, typically when the driver stage detects no load while switching. No manufacturer documents this code publicly with thresholds, and no NHTSA bulletin index entry names it; the text relies on CARB's comprehensive component rules for outputs and on supplier information on EGR coolers in the coolant circuit. Check connector, wiring and pump fuse first. P24A9 and P24AA split the same circuit into shorts to ground and to supply. Without flow the cooler can overheat, so EGR may be reduced.
- What you may notice
- Malfunction indicator lamp on
- EGR may be reduced, NOx output rises
- Likely causes
- LikelyLoose, corroded or unplugged pump connector
- PossibleBroken control wire in the harness
- PossibleOpen winding or electronics in the pump
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.