The code location led to sensor replacement, but a cracked or contaminated encoder continued to distort the signal once per wheel revolution.
Why this matters
The value of this case is the order of evidence and the verification step. The same symptom on another vehicle may have a different cause.
Evidence to capture first
- Exact subcode
- Waveform or wheel-speed graph
- Encoder inspection
- Bearing play and air gap
A disciplined path
- Graph all wheels at low speed
- Look for a periodic dropout
- Inspect the mechanical target
- Replace the supported assembly and verify
Decision point
A sensor reports the target; both sides of that relationship must be tested.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.
KEEP EXPLORING
Related guides
Failed Repair: A/C Recharged Without Finding the Leak
Cooling returned briefly after adding refrigerant, then faded because charge mass was never measured and the leak was not repaired.
Read guide
Failed Repair: Coils Replaced but the Misfire Stayed
All coils were replaced even though the misfire remained on one cylinder and a mechanical sealing test had not been performed.
Read guide
Failed Repair: P0420 Returned After Converter Replacement
The replacement converter did not solve an upstream mixture and oil-consumption condition that continued to damage catalyst performance.
Read guide