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 C is the third of them, usually an NTC whose low voltage means hot. P04CE is its general circuit fault, without separating low and high. FCA lists sensor C codes for its part 68142905A (Ram 2014 6.4 and 3.0 litre, Jeep and Dodge 3.6 Pentastar 2016) together with P040B, P0401 and P2457. Thresholds are not published. Without a valid temperature the EGR flow model is wrong, so the module uses a substitute value or switches EGR off.
Medium severity. Can I keep driving?You can normally drive in moderation, but get it repaired soon: if the valve is stuck open, the engine may idle very poorly.
Symptoms
- Check engine light on
- Usually no change in driving (EGR on a substitute value or off)
- Possibly EGR flow or cooler codes (P0401, P2457)
Most likely causes
- Open or poor contact in signal or ground line
- Connector or wire at the sensor corroded or worn by heat and vibration
- Sensor faulty (element broken or sooted)
- Engine module input
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P04CE means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 4: Emissions
- CE: Specific fault in that system
Frequently asked questions
Can I keep driving with code P04CE?
You can normally drive in moderation, but get it repaired soon: if the valve is stuck open, the engine may idle very poorly.
What causes code P04CE?
The most common causes are: open or poor contact in signal or ground line; connector or wire at the sensor corroded or worn by heat and vibration; sensor faulty (element broken or sooted).
Related codes
- P04CFEGR Temperature Sensor C Circuit Range/Performance
- P04D0EGR Temperature Sensor C Circuit Low
- P04D1EGR Temperature Sensor C Circuit High
- P04D2EGR Temperature Sensor C Circuit Intermittent/Erratic
- P040BEGR Temperature Sensor A Circuit Range/Performance
- P2457EGR Cooler A Efficiency Below Threshold
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.