P24ADEGR Cooler Coolant Pump Feedback Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- 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.
- What you may notice
- Malfunction indicator lamp on
- Often no noticeable effect while driving
- Likely causes
- LikelyFeedback wire broken or pump unplugged, line pulled high
- PossibleFeedback wire shorted to a voltage feed
- RarePump electronics no longer pulling the signal down
- 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.