Chassis, generic

C0032 Left Front Wheel Speed Sensor Supply

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Covers the supply circuit that powers the left front active wheel speed sensor. Active sensors need a regulated voltage from the ABS/ESC module; this code is set when that supply is open, shorted to ground or to another voltage, or is outside the regulated range so the sensor cannot report a valid signal. It is distinct from the sensor-signal code C0031 in that the fault is on the feed rather than in the sensor element or its output. A fault disables ABS, traction and stability control for that corner and lights the ABS warning lamp while base braking remains. No manufacturer documents this code publicly; NHTSA reproduces the J2012 wheel speed sensor codes, with C0032 as left front supply, in its EPS safety report.

Likely causes

Open or shorted sensor supply wire
Corroded connector on the supply side
Module sensor supply output fault

Symptoms

  • ABS warning lamp on
  • ABS and stability control disabled
  • No wheel speed signal from this corner

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–450
Time0.5–2 h

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

Parts involved

lf wsswss supply circuit

Related codes

C0031C0030C0038

References: rosap.ntl.bts.gov, rosap.ntl.bts.gov, en.wikipedia.org.