OBD-II code · Powertrain (generic, extended)
P2495 EGR Cooler Bypass Position Sensor Circuit High Bank 1
Same as P2492 with the signal voltage above the plausible range. 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 P2495?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal shorted to supply
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P249AEGR Cooler Bypass Position Sensor Circuit High Bank 2
- P2492EGR Cooler Bypass Position Sensor Circuit Bank 1
- P2493EGR Cooler Bypass Position Sensor Range or Performance Bank 1
- P2494EGR Cooler Bypass Position Sensor Circuit Low Bank 1
- P2496EGR Cooler Bypass Position Sensor Circuit Intermittent or Erratic Bank 1
- P2497EGR Cooler Bypass Position Sensor Circuit Bank 2
- P2498EGR Cooler Bypass Position Sensor Range or Performance Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.