Chassis, generic

C0110 ABS Pump Motor Circuit Malfunction

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0110 does not appear in the accessible J2012 code tables; it is documented by General Motors, whose brake modules use it for the electric motor of the ABS return pump. In the Saab 9-5 (2010–2011) and 9-4X service data the motor sits in the brake pressure modulator valve while its relay is inside the EBCM; the module leaves the motor off during ordinary braking and runs it only for ABS, traction or stability intervention. The 9-5 logs symptom 06 after an open or grounded feed lasting 0.01 s, the 9-4X uses a 1.8 s window, and symptom 61 marks a seized or worn motor. ABS, TCS and ESC are then disabled for the ignition cycle with ABS and brake lamps lit. A GM bulletin for the 2014 Cadillac ELR also lists C0110.

Likely causes

Open or high-resistance pump motor supply or ground (fuse, connector, ground point)
Seized or worn pump motor in the modulator valve assembly
Faulty pump motor relay inside the brake control module

Symptoms

  • ABS and red brake warning lamps on
  • Traction and stability control indicator on, systems disabled
  • No ABS intervention on slippery surfaces

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,500
Time0.5–4 h

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

Parts involved

abs pump motorabs control moduleabs relaypower supply wiring

Related codes

C0267C052CC0121C0265

References: saabwisonline.com, saabwisonline.com, static.nhtsa.gov, static.nhtsa.gov.