Chassis, generic

C052E ABS Pump Motor Control Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Low counterpart of C052D: the pump motor control signal stays near ground when it should rise, pointing to a short to ground on the control side, a failed driver stage or a weak ground path of the hydraulic unit. No maker documents C052E publicly. In the Bosch patent US5329238 a terminal below the lower threshold is treated as a short to minus, and the drive is limited or switched off. Ford traced its older pump code C0020 on 2020 Explorer, Aviator and Police Interceptor Utility (bulletin 20-2364) to bad ground contact at G108, partly due to unsuitable bolt plating, and replaced the fasteners instead of the module, a reminder to check grounds first. While the code is active the pump cannot run on demand, so ABS and stability control are disabled.

Likely causes

Poor ground connection of the ABS unit or hydraulic block
Control line or motor lead shorted to ground
Driver stage in the ABS control unit failed

Symptoms

  • ABS and ESC warning lamps on
  • ABS and stability control unavailable

Repair estimate

DifficultyHardWorkshop job
Parts and labour€50–2,000
Time0.5–4 h

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

Parts involved

abs pump motormotor wiring

Related codes

C052DC052CC0020

References: patents.google.com, static.nhtsa.gov, mitsubishitechinfo.com.