Chassis, generic

C0185 Lateral Acceleration Sensor Range/Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleRequired
Limp modePossible

C0185 is missing from the accessible J2012 lists and from the NHTSA bulletin index, and no maker documents it, so it is not publicly verifiable; its title is shared with C0499. It describes a lateral acceleration signal that is electrically intact but does not fit the motion of the car. GM-based service data for the Saab 9-4X file exactly this case under C0186 with symptom 5A: an offset outside its window, or a value that disagrees with yaw rate, steering angle and speed. Honda patented a check that flags the sensor when its reading exceeds the smaller of V²/R and 1 g in both left and right turns, so a slope offset alone does not trip it. A Bosch patent covers clearing such a fault only after offset and model comparisons pass while driving straight and cornering.

Likely causes

Sensor offset drifted or calibration not learned after replacement
Sensor or module loose or mounted at the wrong angle
Implausible comparison signal (steering angle, wheel speeds)

Symptoms

  • Stability control warning lamp on, ESC switched off
  • Unwanted stability interventions when cornering

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

lateral acceleration sensoresp control modulesensor cluster

Related codes

C0186C0499C0196

References: saabwisonline.com, patents.google.com, patents.google.com.