Fan 2 Control Circuit Low
The P0693 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit of the cooling fan 2. This typically means the fan is not receiving the proper signal to operate, often due to a short to ground, a faulty fan relay, or a defective fan motor. The system is designed to manage engine temperature, and this fault can lead to overheating if not addressed.
01. Most Common Causes
- Short to ground in fan 2 control circuit
- Faulty fan 2 relay
- Defective fan 2 motor
- Damaged wiring or connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Engine overheating
- Check Engine Light illuminated
- Cooling fan 2 not operating
- Air conditioning performance reduced
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0693 is present.
Step 2: Visually inspect fan 2 wiring and connector for damage or corrosion.
Step 3: Test fan 2 relay and replace if faulty.
Step 4: Check for voltage at fan 2 connector with engine running; if no voltage, trace circuit for open/short.
Step 5: If voltage is present but fan doesn't run, replace fan 2 motor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as the engine may overheat, especially in stop-and-go traffic or hot weather. Have it 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 whether it's a relay, wiring repair, or fan motor replacement.