C0652Left Front Wheel Speed Sensor B Range/Performance
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The second left front wheel speed signal is present but implausible. With two channels per wheel the module has a direct partner to compare: Volvo Truck's patent for a dual-element sensor merges both signals with an integrity index, averages them while they agree within a band, takes the higher value when both run but differ, and drops a channel that reads zero. Bosch's patent for shared wheel sensors lists the usual checks, among them air gap, pulse width and speed plausibility. For single sensors, Toyota, as described by FenderBender, judges plausibility from about 10 km/h forward and flags an 8 km/h gap to vehicle speed; how B is judged is not published. Causes: worn encoder, excessive air gap, wrong part.
- What you may notice
- Driver assistance or redundant braking warning
- Automated functions withdrawn while ABS on sensor A continues
- Likely causes
- LikelyAir gap too large from bearing play or a sensor not seated fully
- PossibleDamaged or contaminated magnetic encoder
- RareSensor variant not matching the vehicle
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.