P044BEGR Sensor C Circuit Range/Performance
- 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
- Exhaust gas recirculation (EGR) routes part of the exhaust back into the intake to lower combustion temperature and NOx. What EGR sensor C is depends on the maker: on Ford petrol engines from 2020 it is the DPFE sensor, which measures the pressure drop across an orifice in the EGR pipe (sensor A there is the valve position sensor); GM diesels assign it to the position sensor of a low-pressure EGR valve, but only within fault groups. P044B means its signal is electrically valid but implausible – for example a pressure difference with the valve closed, or no reaction when it opens. No manufacturer document available to us uses this code; Ford checks the DPFE plausibility under its own codes P139A–P139C (hoses swapped, front or rear hose off or blocked). EGR flow diagnosis is then suspended.
- What you may notice
- Check engine light on
- Usually no change in driving
- EGR readiness not set, EGR possibly switched off
- Likely causes
- LikelyPressure hoses off, swapped or blocked (soot, condensate)
- PossibleSensor zero point drifted
- PossibleOrifice or EGR pipe coked
- RareContact resistance in the connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.