Chassis, generic

C003E Rear Wheel Speed Sensor Supply

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Covers the supply circuit that powers a single rear active wheel speed sensor on vehicles with one combined rear speed signal. Active sensors need a regulated voltage from the ABS/ESC module; this code is set when that supply is open, shorted to ground or another voltage, or outside the regulated range so the sensor cannot produce a valid signal. It is distinct from the sensor-signal code C003D in that the fault is on the feed rather than the sensor element. A fault disables ABS, traction and stability control and lights the ABS warning lamp while base braking remains. No manufacturer documents this code publicly; the J2012 table in NHTSA's EPS safety report lists C003E as the rear sensor supply.

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 rear wheel speed signal

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

rear wsssensor supply

Related codes

C003DC003CC003B

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