Chassis, generic

C0500 Left Front Wheel Speed Sensor A Circuit/Open

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0500 flags lost continuity in the left front wheel speed sensor circuit. An active sensor draws a steady current even with the car parked; Allegro gives 7 and 14 mA as the usual levels of a two-wire interface, so a reading near zero means a broken path. GM's 2016 hybrid OBD tables set C0500 once the signal-line current stays under 3.8 mA for 0.12 s, rated Type A (MIL on the first trip), and suppress it while C05A4 reports a low sensor supply. Mitsubishi maps C1061-13 to C0500 with a delay of at most 1 s and the check-engine lamp after one trip. Unrelated: a Stellantis brake bulletin for the 2022–2023 Wagoneer uses C0500-00 for a hydraulic leak. With this code ABS, stability and traction control shut down.

Likely causes

Sensor plug corroded or loose, or a wire broken along the wheel arch
Left front sensor open internally
ABS module supply, fuse or fusible link faulty (Mitsubishi lists these)

Symptoms

  • ABS, ESC and traction control warning lamps on, check-engine lamp on some makes
  • ABS, stability control and hill start assist unavailable
  • Scan tool shows no left front wheel speed while driving

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–400
Time0.5–2.5 h

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

Parts involved

wss lfsensor wiring

Related codes

C0501C0502C0503C0504C0505C0506C05A4C0031

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