Powertrain, generic

P0E7D Coolant Bypass Valve B Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P0E7D is stored when the line driving valve B sits above its expected level, for instance with the wire chafed against a powered line or a driver that cannot pull the circuit down. Stellantis names this code in the same software bulletins as its low sibling: 18-071-26 for the 2025 RAM pickup with Hurricane power, plus 18-082-26 (SO engine) and 18-083-26 (HO engine) for the 2025 Wagoneer and Grand Wagoneer. All of them require a lit check engine light, and the fix is a reflash of the engine control module, sometimes alongside oxygen sensor and airflow codes. Before replacing hardware it is therefore worth checking for such an update. CARB expects outputs like this to be checked for circuit faults. The low case is P0E7C, an open circuit P0E7B, a networked actuator that stops talking U063C.

Likely causes

Outdated engine control software (Stellantis bulletins 18-071-26, 18-082-26, 18-083-26)
Valve B control wire shorted to a voltage source
Open circuit pulled high by the module input

Symptoms

  • Check engine light
  • Other stored codes after the same software issue

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

coolant bypass valve bwiring harness

Related codes

P0E7BP0E7CP0E7EP0E77U063C

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.