P2497EGR Cooler Bypass Position Sensor Circuit (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
- P2497 is the generic circuit fault of the position sensor on the bank 2 cooler bypass, so it can only appear on engines whose second bank has its own EGR cooler with feedback-controlled flap. We found no manufacturer that documents a bank 2 bypass sensor; all published examples, such as GM's Duramax tables, are single-bank engines that use P2494 and P2495 on bank 1. The logic would be the same: the controller expects a voltage between fixed limits and flags the circuit when it is missing or implausible in a way not covered by the low and high codes. Bypass control on that bank is then usually suspended. A check of the connector, the 5 V supply and ground at the sensor comes first. The bank 1 equivalent is P2492.
- What you may notice
- Check engine light on
- Bypass on bank 2 no longer regulated
- Likely causes
- LikelyDamaged wiring to the bank 2 position sensor
- PossibleConnector not latched or corroded
- RareFailed position sensor or bypass valve
- 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 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.