P2E63Engine Coolant Bypass Valve E Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2E63 flags a drive line for coolant bypass valve E whose voltage is lower than the commanded state allows, typically a grounded wire or a heavy leakage path to ground in the harness or the actuator. No carmaker documents valve E publicly. CARB does not even force separate codes for open and shorted outputs, so many systems use only one code. Toyota shows the subtype idea on valve A: P268111 marks a grounded circuit, P268115 a battery short or a broken line; bulletin T-SB-0112-24 fits a new water valve or water bypass hose assembly, depending on model, on A25A and M20A engines (2018–2021). A 1995 US patent on solenoid drivers suspends its checks for a broken line or a battery short for as long as a ground fault persists. Check the harness for chafing at hot or moving parts before replacing the valve.
- What you may notice
- Check engine light, sometimes a maintenance message
- Valve does not move or stays in its default position
- Slower warm-up or changed heater output
- Likely causes
- LikelyChafed drive wire touching engine ground
- PossibleInternal short in the valve actuator, often after coolant got into it
- PossibleCorrosion bridging pins in the connector
- RareFaulty 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.