Chassis, generic

C050F Left Rear Wheel Speed Sensor A Circuit High

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C050F covers the opposite electrical case: the left rear circuit sits too high, as when the signal wire touches a battery-fed conductor. For GM's 2016 hybrids, 12 V surpassed on the signal wire for 0.12 s, with more than 6.9 V system voltage, is the trigger; the 2023 tables instead look at current and flag a signal wire carrying over 50 mA, again within 0.12 s and as Type A. Mitsubishi lists C1065-12 as C050F, a short circuit found within one second that lights the MIL after one trip. Rear harnesses often share a loom with parking brake motor, trailer socket or tail lamp feeds, so insulation damage near those conductors is worth checking before a sensor is replaced.

Likely causes

Signal wire shorted to a battery-fed circuit in the rear loom
Left rear sensor draws excessive current internally
Brake module input stage defective

Symptoms

  • ABS and stability lamps on immediately, MIL on some makes
  • No ABS regulation, rear brake force distribution in fallback mode

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–450
Time0.5–3 h

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

Parts involved

wss lrsensor wiring

Related codes

C050CC050DC050EC0510C0511C0515

References: gsi.ext.gm.com, gsi.ext.gm.com, mitsubishitechinfo.com.