P1299Engine Cooling

Cylinder Head Overtemperature Protection Active (Ford)

P1299 is a Ford code meaning the cylinder head temperature (CHT) sensor detected an overheat condition and the fail-safe cooling mode engaged. The engine may run on reduced cylinders to protect itself.

🚗 No. This indicates engine overheating protection has engaged; stop and let it cool.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Low coolant or coolant leak$20-$400

45%

Loss of coolant causes rapid overheating.

#2Failed thermostat or water pump$100-$600

30%

Poor coolant flow leads to overheating.

#3Faulty CHT sensor or cooling fan$50-$400

25%

A bad sensor or non-working fan lets temperatures climb.

🩺 Common Symptoms

Overheating gauge or warning
Reduced engine power (fail-safe mode)
Check engine light
Coolant loss or steam

💰 Repair Cost: DIY vs Shop

DIY Cost

$20-$400

Shop Cost

$150-$800

📋 Free OBD2 Code Cheat Sheet

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🔧 How to Diagnose P1299

1Stop and let the engine cool safely

2Check coolant level and inspect for leaks

3Test the thermostat, water pump, and cooling fan

4Verify the CHT sensor reading and wiring

❓ Frequently Asked Questions

Can I drive with P1299?

No. Continued driving during overheating can severely damage the engine. Stop and cool it down.

Is P1299 a Ford code?

Yes, P1299 is a Ford cylinder head overtemperature protection code.

What causes P1299?

Low coolant, a bad thermostat or water pump, or a failed cooling fan or CHT sensor are the usual causes.

🔗 Related Codes

P1285P0217P0128