P0D1E: Hybrid/EV Battery Pack Coolant Control Valve B Control Circuit High
What to do
A stuck valve redirects cooling rather than stopping it, so the symptom usually appears somewhere unrelated — the pack derating, the cabin not heating, charging slowing. With two valves fitted the combinations multiply, so mention everything that has changed rather than only the obvious complaint.
What this code means
The second coolant control valve's control circuit is reading high. The valve's role is at P0CDF and the two-valve complication at P0D1A.
Likely causes
Start here
- Faulty battery pack coolant control valve · moderate
- Corroded or loose connector · easy
Less common
- Debris or corrosion seizing the valve · moderate
- Low coolant level · easy
- Damaged wiring harness · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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