P04E5EGR Temperature Sensor D Circuit
- 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. The code standard allows up to four EGR temperature sensors, A to D – for example before and after the cooler, or in the high- and low-pressure circuits; which is which depends on the maker. Sensor D is the fourth of them, usually an NTC whose low voltage means hot. P04E5 is its general circuit fault, conceivable on systems with high- and low-pressure EGR and two sensors per circuit. No manufacturer document available to us uses sensor D – GM, Ford and FCA use at most A to C – so the description follows CARB's requirement to check input circuits for continuity and range. EGR then uses a substitute value or is switched off.
- What you may notice
- Check engine light on
- Usually no change in driving (EGR on a substitute value or off)
- Possibly EGR flow or cooler codes (P0401, P2457)
- Likely causes
- LikelyWire or connector fault
- PossibleSensor faulty
- RareEngine module
- 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: €60 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.