OBD-II code · Powertrain (generic, extended)
P2492 EGR Cooler Bypass Position Sensor Circuit Bank 1
A general circuit fault on the position feedback sensor of the EGR cooler bypass valve on bank 1. EGR mixes inert exhaust into intake to lower combustion peak temperature — too little raises NOx, too much causes misfires and rough running.
Is it safe to drive with P2492?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in sensor or wiring
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.8–2 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Cooler Bypass Position Sensor B1
Related codes
- P2497EGR Cooler Bypass Position Sensor Circuit Bank 2
- P248FEGR Cooler Bypass Control Circuit Range or Performance Bank 2
- P2490EGR Cooler Bypass Control Circuit Low Bank 2
- P2491EGR Cooler Bypass Control Circuit High Bank 2
- P2493EGR Cooler Bypass Position Sensor Range or Performance Bank 1
- P2494EGR Cooler Bypass Position Sensor Circuit Low Bank 1
- P2495EGR Cooler Bypass Position Sensor Circuit High Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.