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High Voltage Warning:
Renault valve relay faults can affect battery management, charging, and motor operation. Immediate specialist diagnosis is recommended.
What Are Valve Relay Fault Codes 20675 / 50C3 / C10C3 / DF017?
These fault codes indicate a failure in the HV battery relay / valve system controlling cell balancing, DC/AC conversion, or energy distribution in Renault EVs like Zoe and Kangoo ZE.
Common Causes
- Faulty HV valve relay
- Battery cell imbalance or module issues
- Corroded connectors or wiring faults
- Inverter or PEB communication errors
- HV system voltage spikes or moisture ingress
Symptoms
- Battery warning lights or error messages
- Charging interrupted or not possible
- Reduced motor power or limp mode
- Repeated fault codes on diagnostics
- HV system faults during driving
Our Repair Solutions
We specialise in diagnosing and repairing Renault valve relay fault codes across London. Our service includes relay module reconditioning, wiring repair, HV system testing, and post-repair coding — avoiding unnecessary battery replacements.
Questions About Valve Relay Faults?
Our specialists are ready to assist — don’t hesitate to get in touch.
📞 Call 07779 836677