Chassis, generic

C0146 Left Front ABS Outlet Solenoid Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Like its neighbours, C0146 is missing from the accessible J2012 tables and is documented only in Saab and GM material. Saab's 9-3/9-5 data for the Bosch 5.3 TC/ABS name it the left pressure-reduction valve, the ESP version of the 9-5 calls it the left pressure relief valve; the GM keyword list PIP5094 includes the number and AA1Car's GM-based table labels it Left TCS Solenoid #2. Its job is the opposite of C0141: it lets pressure out of the left circuit again. Its title reads it as the left front outlet valve, which matches that role. With the Saab diagnostic tool the valve can be clicked at 1 Hz for about 30 seconds to confirm whether it responds. A failure takes ABS, traction control and ESP out of service.

Likely causes

Open or shorted coil of the left pressure-reduction valve
Control module fault (Saab replaces the control module after checks)
Weak supply or ground to the brake control unit

Symptoms

  • Several brake-related warning lamps on together
  • ABS, traction and stability control unavailable

Repair estimate

DifficultyHardWorkshop job
Parts and labour€300–1,500
Time1–4 h

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

Parts involved

abs outlet solenoidabs hydraulic unitabs control module

Related codes

C0141C0156C0200

References: saabwisonline.com, saabwisonline.com, static.nhtsa.gov, aa1car.com.