Powertrain
generic / SAE
P2257
Secondary Air Injection System Control A Circuit Low
The control circuit of the secondary air injection system A reads a voltage below specification. Either the relay output is shorted to ground or the wiring/load is faulty.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 57
Possible causes
- Control wire shorted to ground high
- Faulty SAI relay medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–600 €
- Estimated time: 0.5–2 h
- Component: secondary air pump
- Component: sai relay
- Component: sai wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012