P045EEGR B Control Stuck Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Exhaust gas recirculation (EGR) routes part of the exhaust back into the intake to lower combustion temperature and NOx. EGR B is a second EGR valve next to valve A – on diesels with two EGR circuits the low-pressure valve, which takes exhaust after the particulate filter and feeds it in before the turbo compressor. GM's diesels of 2016–18 and FCA's 2.2-litre diesel in the Jeep Wrangler use it. P045E means valve B does not close: its actual position stays above the target despite the close command. On FCA's 2.2-litre diesel in the Jeep Wrangler, deposits in the low-pressure valve cause it; the bulletin prescribes a cleaning routine of nine ignition cycles that moves the valve repeatedly. Another FCA bulletin shows P045E following a position sensor fault (P0407/P0408). Too much EGR causes misfire, lack of power and smoke.
- What you may notice
- Check engine light on
- Lack of power, rough running, misfire
- Possibly black smoke
- Likely causes
- LikelySoot or condensate deposits in the low-pressure valve
- PossibleValve position sensor fault as the trigger
- PossibleActuator gear or return spring faulty
- RareForeign matter or filter debris in the low-pressure circuit
- 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: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.