Chassis, generic

C0163 Left Rear ABS Outlet Solenoid Circuit Malfunction

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modePossible

None of the reachable J2012 lists, maker indexes or NHTSA bulletins mention C0163, so its use cannot be shown for any vehicle. The title names the outlet solenoid of the left rear brake, the valve that opens during anti-lock control to dump caliper pressure toward the return pump and lets the wheel recover. If it cannot open, the rear wheel may lock; if it sticks open, the rear brake loses pressure during regulation. Electrically, controllers verify the coil with short current pulses: MOTOR describes the ATE module checking every outlet and inlet coil in a fixed sequence and flagging the missing one, and the Toyota/Denso patent cuts all valve power through a relay after such a finding. Bosch places these valves together with the pump in the hydraulic unit.

Likely causes

Rear left outlet coil open or shorted

Poor contact at the hydraulic unit connector

Outlet valve mechanically stuck by contaminated fluid

Symptoms

ABS warning lamp on
Unstable rear axle under hard braking without ABS

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

C0158 C0206

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