Chassis, generic

C060F Left Park Brake Actuator Stuck On

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C060F is the reverse of C060E: the left actuator does not release, or the module cannot confirm that it has. An Advics patent recognises release by watching motor current while the motor runs backwards: once the current stops changing after a minimum time of around 200 ms, the clamping force is taken as zero and the motor runs on briefly to set pad clearance. A release that never shows this pattern, or a motor that stalls, fits a stuck-on fault. Seized pistons, a corroded spindle nut, pads frozen to the disc or a broken gear stage are typical. ZF's workshop guide requires the scan tool maintenance mode before the actuator unit is replaced. Driving with the brake applied overheats the rear brake.

Likely causes

Seized caliper piston or corroded spindle nut
Pads frozen or rusted to the disc after standing
Broken gear stage in the actuator

Symptoms

  • Left rear brake drags, smells hot or the car pulls away sluggishly
  • Park brake lamp stays on after release
  • Release message or refusal to drive off

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–800
Time0.5–2.5 h

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

Parts involved

left epb actuatorepb control module

Related codes

C060EC060BC0614C0680

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