C0670Left Front Acceleration or Position Sensor Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- C0670 is absent from the publicly available J2012 lists, but GM assigns it in its electronic damping control. In Saab's 2011 workshop data for the 9-5 and 9-4X it covers the vertical acceleration sensor at the left front wheel, which the suspension module supplies with 5 V and which answers with 0.5 to 4.5 V. Subcode 02 sets when the signal remains below 0.5 V longer than 1.5 s, 05 when it remains above 4.5 V as long, and 0A when it changes too rarely for 2.5 s above 30 km/h. Variable damping is then switched off until the next ignition cycle and a suspension warning appears. GM bulletin PI0954 names C0670 among five accelerometer codes on the 2010 LaCrosse with real-time damping when a service sensor meets an early controller. Nothing public ties the code to the park brake; C0675 is the right-hand twin.
- What you may notice
- Service suspension message in the instrument cluster
- Adaptive damping inactive, firmer or less controlled ride
- Likely causes
- LikelyWheel acceleration sensor, its 5 V supply or signal wire faulty
- PossibleReplacement sensor not compatible with early suspension module (GM PI0954)
- PossibleCorroded or loose connector at the wheel housing
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.