What it means
Acceleration data from module B does not correlate with wheel speed and steering inputs.
How it works
Multi-axis acceleration sensor module B supplies movement data that the stability-control system checks against wheel-speed and steering inputs. This code means module B's data does not agree with those other signals under the conditions monitored.
Common causes
Most likely first.
- Multi-axis acceleration sensor fault
- Sensor mounting or orientation problem
- Wiring or connector fault
Symptoms
- Stability-control warning light on
- Traction or stability control may be limited
How to diagnose it
- Read freeze-frame data and compare module B acceleration, wheel speeds, and steering input values to identify which readings disagree.
- Check for related wheel-speed or steering-angle codes, since a fault in those inputs can create an apparent module B correlation problem.
- Inspect module B's mounting and orientation for looseness or incorrect installation that could skew its movement readings.
- Inspect module B's connector and harness for damage, corrosion, loose terminals, or poor routing.
- Compare live data during a safe, straight, low-speed drive and test the affected circuits against the manufacturer's specification.
Common fixes
- Correct loose or misoriented module B mounting.
- Repair module B connector or wiring faults.
- Repair faults in a wheel-speed or steering input identified by related codes.
- Replace module B if its data remains inconsistent after other inputs and circuits are verified.
Can I keep driving?
Stability control may be limited because the system cannot reconcile module B's movement data with steering and wheel-speed information. Drive cautiously and avoid abrupt manoeuvres until the cause is corrected.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.