Basic checks
Veepeak OBDCheck BLE
A Bluetooth LE adapter for reading standard engine codes and supported live data.
View on AmazonC055A
ABS Pump Motor Supply Voltage Circuit A High
High severity
ABS pump motor supply voltage A above expected range.
ABS pump motor supply voltage A above expected range.
Common causes
- high
Charging system overvoltage
One of the most commonly reported causes for this code — check this first.
Typical part cost: $60-660
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for C055A.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for C055A.
Unlock diagnosisFree forever · No credit card
Tools you may need
Already have a compatible scanner? Use it. If not, a Bluetooth OBD2 adapter can help you confirm engine codes and check supported live sensor data before replacing parts.
Regular diagnostics
vgate iCar Pro BLE 4.0
A Bluetooth LE adapter with an automatic sleep feature for routine code and sensor checks.
View on AmazonAnother option
OBDLink CX
A Bluetooth LE adapter to consider when comparing supported vehicles and diagnostic apps.
View on AmazonIllustrations shown, not product photos. Check vehicle, phone and app compatibility before buying. These adapters do not guarantee access to ABS, airbags or manufacturer-specific systems. Clearing a code does not repair the fault and can reset emissions readiness monitors.
As an Amazon Associate, Wrenchify earns from qualifying purchases. This supports the app at no extra cost to you.
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for C055A.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does C055A mean?
C055A means "ABS Pump Motor Supply Voltage Circuit A High". It is a generic OBD-II code that points to a fault in the chassis.
What are the most common causes of C055A?
charging system overvoltage — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full C055A diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.