OBD-II trouble code
P1299: Ford: Cylinder Head Over Temperature Protection Active
Application matters: This manufacturer-specific Ford name is printed in the cited recall document. A separate software bulletin applies only to the listed 2024 F-150 2.7L EcoBoost North American condition, including normal fan operation and no coolant loss; it must not be used to dismiss real overheating.
Ford’s cylinder-head temperature protection has been activated. Stop safely for an overheating warning and have the actual temperature, cooling condition and applicable control-system information assessed.
Quick facts
- System
- Powertrain
- Category
- Engine Cooling Protection
- Severity
- High severity
- Driving guidance
- Stop safely and arrange diagnosis
- Repair cost range
- Get a vehicle-specific estimate after diagnosis.
- DIY difficulty
- Shop recommended
A code alone cannot establish whether driving is safe. Stop safely for a red brake or oil-pressure warning, overheating, severe misfire, stalling, or impaired braking or steering, and follow the owner's manual. Restraints faults can reduce crash protection even when the vehicle runs normally.
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What does P1299 mean?
In Ford’s cited information, P1299 means Cylinder Head Over Temperature Protection Active. The 2024–2025 gasoline monitor summary also describes it as fail-safe cooling activated. The code identifies a protection response to the temperature information the controller assessed; it does not by itself identify the failed part or establish the engine’s condition.
Ford’s monitor example describes protective fuel shut-off to reduce engine and coolant temperature. That response is not a guarantee that continued driving will prevent damage. Treat an over-temperature or stop warning seriously: move to a safe place, follow the vehicle’s shutdown instructions and obtain assistance. Do not keep driving to test whether the protection works, repeatedly restart the engine or open a hot cooling-system cap.
A repairer needs to distinguish a real cooling or temperature problem from an applicable control-system issue. Preserve the complete scan, event data and warnings, and describe coolant loss or other symptoms already noticed. The technician should assess the actual temperature information and cooling condition under the vehicle’s procedure before selecting parts or programming. A single stored code does not prove a failed sensor, thermostat or cylinder head.
Ford TSB 24-2441, issued December 19, 2024, supplies one narrowly defined software example: a 2024 F-150 with the 2.7L EcoBoost engine in North America, an over-temperature warning, P1299 and/or P2C39, normal cooling-fan operation and no coolant loss. For vehicles meeting every stated condition it calls for PCM reprogramming. An overheating vehicle with a coolant leak or different application cannot be placed on that path from P1299 alone.
The older 17S09 recall document is used here for its printed code name. It does not establish that a vehicle with this code has a cracked head, is covered by that recall or currently qualifies for a free repair. Ask the manufacturer or dealer to check the VIN separately. After diagnosis, request the demonstrated cause, required repair and confirmation plan in an itemized estimate.
Possible causes
- A genuine cylinder-head temperature or cooling-system condition established by the vehicle’s diagnosis
- A temperature-signal or control condition requiring the matched professional checks
- PCM software in the specifically matching 2024 F-150 2.7L EcoBoost bulletin condition
Symptoms
- An engine over-temperature or related warning
- A malfunction indicator with P1299 stored
- Protective engine operation or reduced available power in the applicable strategy
- Coolant loss or other overheating signs if an actual cooling fault is present
Diagnostic steps
Save the full scan report, code status, and available freeze-frame data before clearing anything. Confirm the reporting module, any failure-type suffix, and the procedure for the exact vehicle. The steps below are an overview; use manufacturer specifications and safety procedures for testing.
- 1.Stop safely for active overheating, severe power loss or a stop instruction and arrange assistance. Do not open a hot cap, reproduce the event or continue a trip to test the protection.
- 2.Preserve the full fault record, event information and warnings. Tell the technician about coolant loss, recent service and symptoms already observed.
- 3.Have the actual temperature information and cooling-system condition assessed using the correct vehicle procedure. Do not assume a sensor or cylinder head has failed from the title.
- 4.Have current bulletin applicability checked. The cited software example requires every listed vehicle and symptom condition, including normal fan operation and no coolant loss.
- 5.Approve the established repair and required confirmation. Check any recall or warranty eligibility by VIN separately; clearing P1299 does not demonstrate that overheating has been resolved.
Repair cost
Get a vehicle-specific estimate after diagnosis.
A trouble code alone does not price the repair. Ask the shop to identify the confirmed fault and itemize diagnosis, parts, labor, programming or calibration, and taxes.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with vehicle-specific fault diagnosis preselected. Adjust labor rate and vehicle category to fit your situation.
Related repairs
These links are planning examples; the code does not confirm that any listed part has failed.
DIY vs shop
A qualified shop is recommended because this can involve manufacturer-grade tooling, training, or certification that most home setups do not have. Ask the technician what testing confirmed the repair.