OBD-II code · Powertrain (generic, extended)
P248E EGR Cooler Bypass Control Circuit Open Bank 2
The EGR cooler bypass valve on bank 2 - routes EGR around the cooler during cold-start to keep cabin and engine warm-up fast - has an open control circuit.
Is it safe to drive with P248E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in valve or wiring
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
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
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Cooler Bypass Valve B2
Related codes
- P245AEGR Cooler Bypass Control Circuit Open Bank 1
- P248BReductant Heater A Sense Circuit High
- P248CReductant Heater B Sense Circuit Low
- P248DReductant Heater B Sense Circuit High
- 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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.