P24A7 code meaning
EGR Cooler Coolant Pump Control Circuit/Open
Powertrain system Generic code P24xx codes Check engine light
What P24A7 means
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.
P24A7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P24A7
- Malfunction indicator lamp on
- EGR may be reduced, NOx output rises
Common causes of P24A7
- Most likelyLoose, corroded or unplugged pump connector
- PossibleBroken control wire in the harness
- PossibleOpen winding or electronics in the pump
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EGR cooler coolant pump
What each part of P24A7 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| A7 | The exact fault in that area. |
What to do next
- Note P24A7 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P24A7
What does P24A7 mean?
P24A7 means "EGR Cooler Coolant Pump Control Circuit/Open". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P24A7?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P24A7 fail an emissions test?
Yes, it can. P24A7 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P24A7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P24A7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.