Fan 1 Control Circuit High Voltage
The P0692 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the cooling fan 1 control circuit. This typically means the circuit voltage is above the expected range, often due to a short to power, a faulty fan relay, or a defective fan motor. The PCM monitors the fan control circuit for proper voltage levels; when it sees excessive voltage, it sets this code.
1. Most Common Causes
- Short to power in the fan 1 control circuit
- Faulty cooling fan relay
- Defective cooling fan motor
- Damaged wiring or connector
- Failed PCM (rare)
2. Symptoms You Will Notice
- Engine overheating
- Check Engine Light illuminated
- Cooling fan running continuously or not at all
- Reduced air conditioning performance
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the fan 1 wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the fan relay and fan motor using a multimeter to check for proper resistance and operation.
Step 4: Check for voltage at the fan control circuit with the key on; compare to manufacturer specs.
Step 5: If all else is okay, test the PCM output or consider PCM replacement.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code, as it can lead to engine overheating and potential damage. Have the issue diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the cause. A relay or wiring repair is on the lower end, while a fan motor replacement may be higher.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.