C055A code meaning
ABS Pump Motor Supply Voltage Circuit A High
What C055A means
Supply voltage A of the ABS pump motor is above its upper limit. The motor draws heavy current, so overvoltage stresses motor, relay or semiconductor switch; typical causes are a faulty alternator regulator, a jump-start or charger at too high a voltage, or a measuring fault in the module. No maker documents C055A publicly. Mitsubishi shows comparable limits on the 2023 Outlander PHEV: the motor feed is specified at 10–16 V, and the brake unit stores C1056-17 (generic C0565, ABS module system voltage high) once its ignition supply reaches at least 16 V, with a detection delay of at most 1 s, suspending ABS, ASC and related functions. Circuit B has its own codes (C05A5 ff.). Measure the charging voltage first.
C055A at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C055A
- ABS and ESC warning lamps on
- Other overvoltage warnings or flickering lights at the same time
Common causes of C055A
- Most likelyAlternator regulator or DC/DC converter delivering too high a voltage
- PossibleJump-start or battery charger with excessive voltage
- Less likelyVoltage measurement fault in the ABS control unit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
ABS pump motor supply a
What each part of C055A means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5A | The exact fault in that area. |
What to do next
- Note C055A 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 C055A
What does C055A mean?
C055A means "ABS Pump Motor Supply Voltage Circuit A High". Supply voltage A of the ABS pump motor is above its upper limit. It is a generic code, so it means the same on every make.
Is it safe to drive with C055A?
Drive gently and only to a workshop. With C055A the car can go into limp mode (reduced power) to protect itself.
Will C055A fail an emissions test?
C055A 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 C055A to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. This is a job for a workshop.
Will C055A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.