Chassis, generic

C058F Regeneration Torque Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleRequired
Limp modePossible

C058F covers the case where regenerative braking does not deliver the torque the brake system has planned with. In a blended brake the brake module asks the electric drive for generator torque, usually the smaller of the available capacity and the driver's demand, estimates what actually arrives and adds friction braking for the rest, as a GM/BMW/Daimler/Chrysler patent explains. Ford Otosan describes inferring the regenerative share from vehicle deceleration and switching to friction braking at once when regeneration is unavailable, for example with a full or hot battery. Ford notes that its ABS module may cap regenerative torque and that on plug-in hybrids lost regeneration shortens electric range. No manufacturer documents C058F publicly; expect reduced recuperation.

Likely causes

Electric drive or inverter delivering less generator torque than requested
Traction battery unable to absorb charge (full, hot or cold)
Torque arbitration or estimation software in the brake or hybrid module
Missing or delayed torque messages between brake and drive modules

Symptoms

  • Regenerative braking reduced or disabled, friction brakes do more work
  • Uneven deceleration or changed pedal feel during light braking
  • Shorter electric range on plug-in hybrids and EVs
  • Brake or hybrid system warning message

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

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

Parts involved

regen brake systembrake control modulehybrid control module

Related codes

C05ADC0563C05AB

References: fordservicecontent.com, patents.google.com, patents.google.com, bosch-mobility.com.