What it means
The control module detects a low signal in the control circuit for battery cooling fan 2. It sets the code when the circuit signal stays below its calibrated range during monitoring.
How it works
The control circuit for battery cooling fan 2 carries the command or electrical signal used to operate that fan. This code sets when the module sees the circuit signal stay below its calibrated range, which can prevent fan 2 from operating as intended.
Common causes
Most likely first.
- Short to ground in fan wiring
- Faulty cooling fan motor
- Loose or corroded connector
- Faulty fan control module
Symptoms
- Hybrid system warning light
- Battery cooling fan may not operate correctly
- Reduced power
How to diagnose it
- Save freeze-frame data and check fan 2 command and status to see whether the low circuit reading coincides with a failed fan response.
- Inspect fan 2's accessible harness and connector for a wire shorted to ground, corrosion, loose terminals, or physical damage.
- Check for debris or a seized fan that could overload the circuit and affect its operation.
- With the vehicle powered down according to the manufacturer's procedure, test the fan 2 control circuit for a short to ground and check connector continuity.
- If the wiring and fan are sound, test the fan control module's output using the manufacturer's procedure.
Common fixes
- Repair a control wire shorted to ground.
- Clean, secure, or repair a corroded or loose fan 2 connector.
- Replace a fan 2 motor that is seized or fails its test.
- Repair or replace the fan control module if it produces an out-of-range output.
Can I keep driving?
Limit hard acceleration, towing, and extended driving until fan 2 operation is confirmed, because poor battery cooling can prompt reduced hybrid power. Do not access the high-voltage battery or its wiring.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.