P245AEGR Cooler Bypass Control Circuit/Open (Bank 1)
- 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
- The bypass lets cold-start EGR skip the cooler and is switched back to cooling once the engine is warm. P245A flags the bank 1 control circuit, usually as an open. GM's 2017 tables show both actuator types: on the Duramax with a DC-motor flap the controller sees a load resistance above 200 kOhm while the H-bridge is off and needs 160 failures in 200 samples, while the vacuum-switched version needs 24 of 30 samples with the flap commanded to cooling; both are Type B. Ford used P245A differently on its 2013 to 2015 6.7 L Power Stroke, as an intrusive check that fails when the gas temperature after the cooler moves by less than 3 °C per second after the flap switches; in 2023 that test carries P245B. Ford reflashed 2018 to 2019 Super Duty PCMs for P245A. Shorts are P245C and P245D, bank 2 is P248E.
- What you may notice
- Malfunction indicator lamp on
- EGR cooler bypass no longer switching; possible P2457 or P24A5 as follow-up
- Likely causes
- LikelyOpen wire or unplugged connector at the bypass actuator
- PossibleActuator motor or solenoid winding open
- RareControl software needing an update (some Ford diesels)
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.