Powertrain
generic / SAE
P25B7
Auxiliary Ignition Switch On/Start Position Circuit
General electrical fault on the auxiliary ignition switch On/Start input. Used on commercial vehicles or upfit applications where a second ignition switch (in a sleeper cab, work platform or crew compartment) can crank the engine.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / B7
Possible causes
- Open or shorted wire high
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–500 €
- Estimated time: 0.5–2 h
- Component: auxiliary ignition switch
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012