C0158 code meaning
Left Rear ABS Inlet Solenoid Circuit Malfunction
What C0158 means
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.
C0158 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0158
- ABS warning lamp on, anti-lock switched off
- Rear wheels can lock under hard braking
Common causes of C0158
- Most likelyRear left inlet coil open, shorted or with wrong resistance
- PossibleCorrosion at the hydraulic unit connector
- Less likelyFailed output stage in the control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
ABS hydraulic unitABS control moduleSolenoid valve
What each part of C0158 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 58 | The exact fault in that area. |
What to do next
- Note C0158 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 C0158
What does C0158 mean?
C0158 means "Left Rear ABS Inlet Solenoid Circuit Malfunction". C0158 is publicly undocumented: it appears in no accessible J2012 table, NHTSA bulletin or manufacturer index. It is a generic code, so it means the same on every make.
Is it safe to drive with C0158?
Drive gently and only to a workshop. With C0158 the car can go into limp mode (reduced power) to protect itself.
Will C0158 fail an emissions test?
C0158 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 C0158 to fix?
Difficulty: hard. A typical repair takes 1.5 to 4 hours of work. This is a job for a workshop.
Will C0158 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.