P04E7EGR Temperature Sensor D Circuit Low
- 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. Sensor D is the fourth of up to four EGR temperature sensors, conceivable on engines with high- and low-pressure EGR and a sensor before and after each cooler; it is usually an NTC whose low voltage means hot. No manufacturer document available to us uses sensor D; the description follows CARB and Ford's checks on sensor B as a comparison. P04E7 means the signal is below its lower limit – a signal line shorted to ground or, theoretically, an extremely high temperature. For sensor B Ford uses below 0.19 V. A substitute value is used and EGR may be reduced.
- What you may notice
- Check engine light on
- Usually no change in driving
- EGR possibly reduced, higher NOx
- Likely causes
- LikelySignal line chafed against ground or the engine
- PossibleSensor shorted internally
- PossibleWater or corrosion in the connector
- RareModule input faulty
- 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: €50 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.