P0694
Fan 2 Control Circuit High
Engine cooling
Generic OBD-II
High
What it means
P0694 means the engine computer detected a high-voltage (usually open) condition in the control circuit for cooling fan 2. The computer expects the circuit to pull low when it commands the fan on, so a persistent high reading means the fan may not run. The main risk is engine overheating at idle or in slow traffic, so it should be addressed promptly.
High
Can I keep driving? Drive carefully — if cooling fan 2 isn't running, the engine can overheat in traffic or at idle; watch the temperature gauge and avoid low-speed driving until fixed.
Common symptoms
What you'll notice
- Engine runs hot or overheats, especially at idle or in slow traffic
- Cooling fan 2 not turning on when it should
- Check-engine light on
- Weak air-conditioning performance at low speeds
Common causes
Most likely first
- Open or high resistance in the fan 2 control circuit wiringLikely
- Faulty cooling fan 2 relay or control module outputCommon
- Poor or corroded connector at the fan or relayCommon
- Failed fan 2 motorLess often
- Faulty ECM/PCM (less common)Less often
How to diagnose & fix
Work through it in order
- Confirm whether fan 2 actually runs when the engine gets hot or the A/C is on.
- Inspect the fan 2 control wiring and connectors for opens, corrosion, or damage.
- Test the fan 2 relay and its control signal from the computer.
- Bench-test the fan motor with direct power to confirm it works. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0694?+
Only briefly and watchfully. If the fan doesn't run, the engine can overheat at idle or in traffic. Keep an eye on the temperature gauge and repair it promptly.
Can I just clear P0694?+
It will return the next time the computer commands the fan and sees the fault. The wiring, relay, or fan needs repair for the code to stay off.
Related codes
Often seen with P0694
Read & clear P0694 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX