Chassis, generic

C050D Left Rear Wheel Speed Sensor A Range/Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modePossible

C050D says the left rear signal exists but is not trustworthy. In GM's 23OBDG07 tables several checks share this code: a weak magnetic flux under 2.2 mT across at least five wheel turns (detected after 8 s at 3.1 mph or 22 s at 1.24 mph), missing standstill pulses for 3.6 s, and an undervoltage on the sensor supply; all are Type B with two trips, and the tables list Bosch, Continental and DF11i sensor variants. GM's 2019 tables add a grey-zone current between 7 and 28 mA for 750 ms. Stellantis lists C050D as a left rear plausibility error in PCM reflash bulletins such as 18-075-20 for the 2018 Jeep Compass. Mitsubishi files C1065-92 as C050D and points to tire size and the sensor rotor.

Likely causes

Air gap to the rear encoder too large (sensor not seated, worn or loose hub bearing)
Contact resistance or leakage in the rear sensor wiring
Left rear tire differs in rolling circumference
Control module software sets the code falsely (Stellantis reflash)

Symptoms

  • ABS and stability lamps come on only after some driving
  • Stability or traction control intervenes without reason at low speed
  • Code may be stored without a lit MIL on some Stellantis models

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–450
Time0.3–2.5 h

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

Parts involved

wss lrtone ring lrtires

Related codes

C050CC050EC050FC0510C0511C0513C051AC0557

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, mitsubishitechinfo.com.