Pump Motor Circuit Open
There’s an issue with the pump motor circuit, likely open or shorted.
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 computer is trying to send voltage to the pump motor for braking, but it's not getting the signals it needs, indicating a bad wire or connection.
What the computer is actually seeing
The brake system control module detects that the pump motor circuit is not completing the circuit correctly, usually showing no voltage where it expects it.
What a healthy reading looks like
Expected voltage at the pump motor connector is typically 12V when activated; resistance in the circuit should be less than 5 ohms.
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.
- 1Inspect pump motor connector for signs of corrosion or damage.
- 2Check the wiring for continuity; look for breaks or shorts.
- 3Measure voltage at the pump motor connector with the key on; should have 12V present.
- 4Test the pump motor by applying direct battery voltage; it should activate and run smoothly.
- 5If the wiring is fine and the pump motor works, suspect a control module issue.
Common causes
- Open circuit in wiring
- Faulty pump motor
- Corroded or loose connectors
- Blown fuse
- Control module failure
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive with this code?
It's moderate; you may have reduced braking performance. Fix it soon.
Will this code come back after clearing it?
Yes, if the underlying issue isn't resolved, it will return.
Does this code relate to any specific braking system?
It can apply to various systems, but it's common in ABS setups.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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