P2498EGR Cooler Bypass Position Sensor Range/Performance (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
- With P2498 the bank 2 bypass position signal is electrically valid but not believable, for example because it does not change when the flap is commanded, settles at an unexpected value or no longer matches the end stops learned earlier. There is no public manufacturer description for this bank 2 code. The closest documented case is bank 1: GM's 2015 LML Duramax showed P2493 together with other bypass sensor codes, and GM's answer was a complete new bypass valve, because sensor and valve form one unit. On a twin-cooler engine the same reasoning applies to the second bank, so a sensor fault and a mechanically binding flap must be told apart with live data before parts are ordered. The bank 1 version is P2493; the actuator side of bank 2 is P248F.
- What you may notice
- Check engine light on
- Measured and commanded bypass position differ on bank 2
- Likely causes
- LikelyWorn bank 2 bypass valve with built-in sensor
- PossibleFlap binding so the sensor reads a position other than commanded
- RareEnd-stop learn values invalid after a repair
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €150 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.