Anode Drain Valve Control Circuit
Generic electrical fault on the anode drain valve control. The drain valve releases liquid water and inert gases that accumulate in the anode loop.
Affected components
- Anode drain valve
- Valve wiring
Common causes
- High likelihood: Valve actuator failed
- Low likelihood: Gateway module routing CAN messages incorrectly
- Low likelihood: CAN terminating resistor (120 Ω) drifted out of spec
Possible symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Diagnostic notes
- The malfunction indicator lamp may illuminate
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.