Chassis, generic

C060E Left Park Brake Actuator Performance/Stuck Off

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C060E is set when the left actuator is driven but does not build or keep the clamping force it should, so the brake effectively stays off. Bosch's EPB patents derive clamping force from motor current: during apply it rises as pads meet the disc and then levels off at the target force. A current that never climbs points to a slipping belt, a stripped gear or a spindle that turns without pushing the piston. FMVSS 135 tests parking brakes by holding a vehicle loaded to GVWR on a 20 % grade, so a weak left side can let the car creep. GM's PIT5662A shows that excess resistance in a rear circuit can also starve the motor. No maker publishes C060E. Expect a park brake warning and limited auto-hold.

Likely causes

Worn gearbox, belt or spindle inside the left actuator
Pads or piston not set up correctly after brake service without maintenance mode
High resistance in the left motor circuit limits motor torque

Symptoms

  • Vehicle may creep on a slope with the parking brake applied
  • Park brake warning lamp or message
  • Motor noise without the usual clamping sound at the left rear

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–700
Time0.5–2 h

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

Parts involved

left epb actuatorepb control module

Related codes

C060FC060BC0613C0680

References: patents.google.com, law.cornell.edu, aftermarket.zf.com, static.nhtsa.gov.