Chassis, generic

C0148 Right Front ABS Outlet Solenoid B Circuit Malfunction

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0148 is listed neither in the publicly available J2012 tables nor in maker indexes or NHTSA bulletins, so what the letter B stands for cannot be verified. The title suggests a second release solenoid for the right front wheel, as some hydraulic units pair two valves per channel. In any ABS unit the outlet side lets fluid escape from the caliper so the wheel can spin up again. Controllers check each coil electrically; a MOTOR article on the ATE system shows the module sending short test pulses to every inlet and outlet coil and setting a code within about 65 ms of key-on if one pulse is missing or too strong. A Toyota/Denso patent pairs such open/short checks with a relay that cuts all valves. With the code stored, the anti-lock function is usually off.

Likely causes

Solenoid coil open, shorted or out of resistance range
Corroded contact between coil and control module
Failed output stage in the ABS module

Symptoms

  • ABS warning lamp on immediately after key-on
  • Anti-lock and related functions switched off

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

C0156C0153C0203

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