OBD-II code · Powertrain (generic, extended)
P2537 Ignition Switch Accessory Position Circuit Low
The ACC input reads stuck low — short to ground or permanently closed contact. The ECM may see ACC active continuously and refuse to enter sleep, draining the battery.
Is it safe to drive with P2537?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyACC wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Ignition Switch, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.