C0146 code meaning
Left Front ABS Outlet Solenoid Circuit
What C0146 means
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.
C0146 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0146
- Several brake-related warning lamps on together
- ABS, traction and stability control unavailable
Common causes of C0146
- Most likelyOpen or shorted coil of the left pressure-reduction valve
- PossibleControl module fault (Saab replaces the control module after checks)
- Less likelyWeak supply or ground to the brake control unit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
ABS outlet solenoidABS hydraulic unitABS control module
What each part of C0146 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 46 | The exact fault in that area. |
What to do next
- Note C0146 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0146
What does C0146 mean?
C0146 means "Left Front ABS Outlet Solenoid Circuit". Like its neighbours, C0146 is missing from the accessible J2012 tables and is documented only in Saab and GM material. It is a generic code, so it means the same on every make.
Is it safe to drive with C0146?
Drive gently and only to a workshop. With C0146 the car can go into limp mode (reduced power) to protect itself.
Will C0146 fail an emissions test?
C0146 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0146 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will C0146 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.