C0186Lateral Acceleration Sensor Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0186 lies outside the publicly available J2012 tables but is firmly established at GM and Saab for the lateral accelerometer. On Saab 9-5 models through 2010 the ESP module sets it when the 0–5 V signal leaves the 0.25–4.75 V band for over 0.1 s or makes no sense; at standstill the reading should be close to 0 m/s². Later GM designs such as the 9-4X read the sensor as part of a multi-axis module over CAN, with symptom 71 for invalid data and 5A for an implausible value. GM bulletins link C0186 together with C0196 and C0287 to a failed multi-axis sensor (PIT5187A, SRX/Equinox/Terrain 2011–2012), to corrosion in connector X411 of Equinox/Terrain 2010–2017 (PIT5427B) and to airbag module software (PI1525). Stability control then stays off.
- What you may notice
- Service StabiliTrak / ESP OFF message or lamp
- Traction and stability control unavailable
- Further chassis codes (C0196, C0287, U-codes) stored
- Likely causes
- LikelyFaulty yaw/lateral (multi-axis) sensor module
- PossibleCorroded connector or terminals in the sensor or bus wiring
- RareOutdated software in the module that hosts the sensor (e.g. airbag module)
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.