Cooling Fan Circuit Short to Ground
There's a short in the cooling fan circuit.
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 seeing that there’s a wiring fault where it thinks the cooling fan circuit is directly connected to the ground, which could mean wire damage or a bad fan.
What the computer is actually seeing
The car's computer checks the cooling fan circuit for continuity. Instead of the expected resistance (usually in kilo-ohms), it sees a near-zero voltage or a direct path to ground when it should detect the fan operation normally.
What a healthy reading looks like
Normal running voltage for the cooling fan circuit is around battery voltage (12-14V), and resistance should be over 5 ohms with no shorts.
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. Inspect the cooling fan wiring and connectors for physical damage or corrosion. If damaged, repair or replace as necessary. Decision Point: Damaged wiring found? -> YES: Repair wiring. | NO: Proceed to step 2.
- 22. Disconnect the cooling fan connector and measure voltage at the harness while turning the ignition on. You should see battery voltage. Decision Point: Voltage present? -> YES: Proceed to step 3. | NO: Check fuses and relay; replace as necessary.
Common causes
- Damaged wiring in the cooling fan circuit
- Faulty cooling fan motor
- Corroded connectors at the fan or ECM
- Shorted fan relay
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive with this code?
It's driveable but monitor the temperature; overheating can damage your engine.
Will the code come back after I clear it?
If the issue isn't fixed, the code will likely return after a short time.
Why does this code sometimes appear with other codes?
It often appears with codes related to fan control when multiple components in the cooling system are failing or compromised.
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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