C058E code meaning
Brake Booster Motor B Position Sensor Circuit Range/Performance
Chassis system Generic code C05xx codes Check engine light
What C058E means
C058E concerns a second rotor angle channel of the electric booster motor whose readings are electrically valid but not believable. In GM's 2019 integrated brake control unit this is MPS2, a SENT sensor checked against the faster SPI sensor MPS1 of the same motor: a gap above 2° plus a 3° speed allowance, opposite directions or a changed rest offset for 100 ms set it, Type A with MIL. GM's PIT5638 series for the 2019 Silverado and Sierra 1500 covers cases where the cluster showed Service Brake Assist and the pedal turned hard; the fix was new BSCM calibration, and the ECM adds P25A2. Stellantis names C058E for the eBooster of the 2022–25 Wagoneer and Grand Wagoneer; if it returns after the revised test, BSCM and booster are replaced as a pair.
C058E at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of C058E
- Service Brake Assist message in the instrument cluster
- Hard brake pedal needing more effort, longer stopping distance
- Check engine lamp via the brake module request (P25A2)
Common causes of C058E
- Most likelyBrake control module calibration causing false correlation faults (GM PIT5638)
- PossibleSecond rotor position sensor in the booster drifting or failing
- PossibleFault inside the brake control module or eBooster unit (replaced together)
- Less likelyPoor contact in the booster sensor connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Booster motor b pos sensorBrake system control module
What each part of C058E means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8E | The exact fault in that area. |
What to do next
- Note C058E 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 C058E
What does C058E mean?
C058E means "Brake Booster Motor B Position Sensor Circuit Range/Performance". C058E concerns a second rotor angle channel of the electric booster motor whose readings are electrically valid but not believable. It is a generic code, so it means the same on every make.
Is it safe to drive with C058E?
Drive gently and only to a workshop. With C058E the car can go into limp mode (reduced power) to protect itself.
Will C058E fail an emissions test?
C058E 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 C058E to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C058E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.