P0E7CCoolant Bypass Valve B Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P0E7C says that the wiring which operates bypass valve B reads too low, typically because a wire or the actuator itself has a ground fault. Stellantis documents the code: bulletin 18-071-26 (revisions A and B, October 2026) for 2025 RAM 1500 pickups fitted with the Hurricane straight-six, SO or HO twin-turbo and bulletin 18-082-26 for the 2025 Wagoneer and Grand Wagoneer name it among the faults cured by new engine control software, with the check engine light on. That points to calibration as a frequent trigger on these engines, besides real wiring damage. A low reading on the line keeps the valve from being driven as intended, so the coolant split between loops is no longer under control. CARB lists such outputs among the components that need circuit monitoring. High and open faults are P0E7D and P0E7B.
- What you may notice
- Check engine light
- Often no noticeable driving symptom
- Likely causes
- LikelyEngine control software needing the update from the manufacturer bulletin (Stellantis 3.0 Hurricane)
- PossibleValve B control wire shorted to ground
- RareInternal short in the valve B actuator
- 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: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.