P2E64Engine Coolant Bypass Valve E Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2E64 is the high-side counterpart: the control line of coolant bypass valve E carries more voltage than expected, usually because it touches a supply wire, or the load has gone open in a way the output stage reads as high. Valve E itself appears in no public manufacturer document. Ford's 2024 summary shows how this is commonly grouped: for its valves A to D the smart driver's short-to-battery result (fault byte 12) is filed under the High code, for example P26BF for valve D, alongside the general circuit code. Toyota pairs short to battery and open circuit in one subtype, P268115. A supplier patent (AMI Semiconductor) separates the cases by driving test currents into the pin and comparing the resulting voltage with thresholds. Check for chafing against live wires and water in the connector.
- What you may notice
- Check engine light
- Valve is not driven and stays in its de-energised position
- Possible change in heater output or warm-up time
- Likely causes
- LikelyDrive wire chafed through and touching a battery-voltage wire
- PossibleMoisture or coolant in the connector creating a path to supply voltage
- PossibleOpen actuator winding that the output stage reads as high voltage
- RareDefective output stage in the engine control 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: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.