P0412low severityPowertrain
Secondary Air Injection System Switching Valve A Circuit
on 2017 Nissan NV3500 5.6L V8 · FWD
What this code means
Malfunction in the AIR switching valve circuit.
Symptoms
- Check Engine Light
- AIR system not functioning
Common causes
- Faulty switching valve
- Wiring issue
- Relay failure
Diagnostic steps
- Test valve solenoid
- Check wiring
- Test relay
Repair notes
Replace switching valve or repair wiring.
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