Chassis, generic

C0158 Left Rear ABS Inlet Solenoid Circuit Malfunction

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0158 is publicly undocumented: it appears in no accessible J2012 table, NHTSA bulletin or manufacturer index. Saab, for example, reports the rear left valve group under C2415 instead. The title points to the electrical circuit of the inlet solenoid for the left rear brake. That valve stays open during normal braking and closes when the rear wheel starts to lock, trapping pressure in the caliper. Toyota and Denso patented a routine check that tests every actuator solenoid for breaks and shorts, raises a fault flag, lights the warning lamp and trips a cut-off relay so the brakes revert to plain pedal operation. MOTOR's measurements on the ATE system add that a coil with wrong resistance reaches its current limit too fast or too slowly.

Likely causes

Rear left inlet coil open, shorted or with wrong resistance
Corrosion at the hydraulic unit connector
Failed output stage in the control module

Symptoms

  • ABS warning lamp on, anti-lock switched off
  • Rear wheels can lock under hard braking

Repair estimate

DifficultyHardWorkshop job
Parts and labour€400–1,500
Time1.5–4 h

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

Parts involved

abs hydraulic unitabs control modulesolenoid valve

Related codes

C0163C0206

References: patents.google.com, motor.com, saabwisonline.com.