P24AD code meaning
EGR Cooler Coolant Pump Feedback Circuit High
Powertrain system Generic code P24xx codes Check engine light
What P24AD means
P24AD is the high-side counterpart of P24AC: the return signal from the EGR cooler coolant pump stays above its valid band. Since such feedback lines are usually pulled up inside the controller, a broken wire or a disconnected pump often shows as a constantly high level, as can a short to a voltage feed. The pump itself may still run normally, but the controller can no longer prove it. As with the low-side code, no maker discloses the band, so the general CARB input checks are the reference. A practical first step is to compare the feedback signal with the command while the pump is triggered from a scan tool, then check the line for continuity and for voltage from other circuits.
P24AD 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 P24AD
- Malfunction indicator lamp on
- Often no noticeable effect while driving
Common causes of P24AD
- Most likelyFeedback wire broken or pump unplugged, line pulled high
- PossibleFeedback wire shorted to a voltage feed
- Less likelyPump electronics no longer pulling the signal down
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 P24AD 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). |
| AD | The exact fault in that area. |
What to do next
- Note P24AD 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 P24AD
What does P24AD mean?
P24AD means "EGR Cooler Coolant Pump Feedback Circuit High". P24AD is the high-side counterpart of P24AC: the return signal from the EGR cooler coolant pump stays above its valid band. It is a generic code, so it means the same on every make.
Is it safe to drive with P24AD?
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 P24AD fail an emissions test?
Yes, it can. P24AD 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 P24AD 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 P24AD clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.