Hydraulic Pump Motor Circuit Failure
Indicates a problem in the hydraulic pump motor circuit of the vehicle's stability control system.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The stability control system's hydraulic pump isn't working right, which affects how the brakes apply force when needed.
What the computer is actually seeing
The computer checks for voltage levels in the hydraulic pump circuit. Expected values are between 0.5V to 12V during normal operation, indicating that the pump is ready to activate when required.
What a healthy reading looks like
0.5V to 12V for normal operation of hydraulic pump.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the wiring and connectors for the hydraulic pump. Look for frayed wires or loose connections.
- 22. Test the voltage at the hydraulic pump connector with the ignition ON. It should read between 0.5V and 12V when the system calls to activate.
- 33. If voltage is good, check the hydraulic pump motor itself for proper operation by applying direct power to it temporarily. Watch for movement or sound.
- 44. If the pump operates correctly when powered directly, investigate wiring from the ECM to the pump for shorts or opens.
- 55. If not, replace the hydraulic pump motor. Recheck system operation.
- 66. Clear the fault code and test drive the vehicle to see if the code returns.
Common causes
- Faulty hydraulic pump motor
- Wiring issues in the pump circuit
- Connector problems (corrosion, loose connection)
- Blown fuses or relays affecting pump operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally drivable, but you might lose stability control in slippery conditions.
Will this code come back after clearing?
It may come back if the underlying issue isn’t fixed. Monitor your dashboard.
Why does this code pair with C0241?
C0241 indicates a related issue with the stability control system, often stemming from similar hydraulic component failures.
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