P24C5EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P24C5 belongs to engines with a second EGR cooler and bypass flap on bank 2. It reports that the end positions learned by that flap's position sensor fall outside the accepted window, so the controller can no longer trust where the flap really stands. No manufacturer documents P24C5 publicly; GM's diesel engines in the available tables use one bypass valve and only show the bank 1 code P24C4. There the learning runs after key-off with a warm engine and checks the raw voltage at both end stops against fixed bands, which gives a good picture of what the bank 2 test checks. CARB requires position feedback of emission-related actuators to be monitored for rationality. Electrical faults of the same sensor are P2497 to P249B; the bank 1 learning fault is P24C4.
- What you may notice
- Malfunction indicator lamp on
- Higher NOx emissions due to poorly controlled EGR cooling
- Likely causes
- LikelyWorn bank 2 bypass valve or sensor track
- PossibleDeposits changing the end positions of the bank 2 flap
- RareSignal shift caused by wiring or connector resistance
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €250 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.