Powertrain
generic / SAE
P0414
Secondary Air Injection System Switching Valve "A" Circuit Shorted
The ECU detected a short circuit in the secondary air injection switching valve A control circuit. With the valve unable to switch correctly, the cold-start emissions strategy fails and the catalyst takes longer to reach light-off.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 14
Possible causes
- Switching valve circuit shorted high
- Wiring or connector fault medium
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–2.5 h
- Component: secondary air valve
- Component: secondary air wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012