P081AStarter Disable Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- The starter disable line carries the signal 'park or neutral – start allowed' from the transmission module, or its built-in range switch, to the body or engine module, which only then releases the starter. On Saab's 2010 9-5 automatic the line is open in a drive range (0 V at the body module) and closed in P or N (12 V). P081A means the start release line is too low – the output is shorted to ground or open. Saab's 2012 9-3 transmission module checks it in D, where the output must have a defined state, with 9–18 V, not in limp mode and continuously; no time threshold is published. Because the engine module then sees no 'P/N', the engine may not start.
- What you may notice
- Engine does not start or only sometimes
- Starter does not crank in P or N
- No check engine lamp
- Likely causes
- LikelyP/N line to the engine module shorted to ground
- LikelyLine or connector open
- PossibleConnector oxidized or pins pushed back
- RareTransmission module output stage faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.