P0696: Fan 3 Control Circuit High
The P0696 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the control circuit for Fan 3. 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 3 control circuit
- Faulty Fan 3 relay
- Defective Fan 3 motor
- Damaged wiring or connector
- Failed PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light on
- Engine overheating
- 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 3 wiring and connector for damage, corrosion, or shorts.
Step 3: Test the Fan 3 relay and circuit for high voltage using a multimeter.
Step 4: Check the Fan 3 motor resistance and operation; replace if faulty.
Step 5: If all else is good, test the PCM output and 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 root cause. Replacing a relay or wiring is on the lower end, while a fan motor or PCM replacement can be more expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.