AutoCodes – Ford – P1289 2001 Ford F150

P1289 2001 Ford F150 Code - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range

Quick Answer

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. Common causes include Wrong thermostat, Engine overheated, Low engine coolant level. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1289 2001 Ford F150 indicates Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range.
Common causes: Common causes include Wrong thermostat, Engine overheated, Low engine coolant level.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,326

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 07, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1289 2001 Ford F150 Description

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (-258°F), the PCM disables four fuel injectors at a time. The PCM will alternate which four injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine. If the temperature exceeds 154 °C (310°F), the PCM disables all of the fuel injectors until the engine temperature drops below 154°C (310°F).

OBDII Code P1289 2001 Ford F150 - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range - AutoCodes.com — P1289 2001 Ford F150 Code - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range

What does this mean?

What are the Possible Causes of the DTC P1289 2001 Ford F150?

Wrong thermostat
Engine overheated
Low engine coolant level
Faulty Cylinder Head Temperature (CHT) sensor
Cylinder Head Temperature (CHT) sensor harness is open or shorted
Cylinder Head Temperature (CHT) sensor circuit poor electrical connection

How to Fix the DTC P1289 2001 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Indicates a Cylinder Head Temperature (CHT) sensor circuit malfunction (open).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1289 2001 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1289 2001 Ford F150 code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1289 2001 Ford F150 Code

1. What does the P1289 code mean on a 2001 Ford F150?

The P1289 code indicates that the Cylinder Head Temperature (CHT) sensor is sending a signal that is out of the expected self-test range, often due to overheating or a faulty sensor.

2. What are the common symptoms of a P1289 code?

Common symptoms include the check engine light turning on, engine overheating, poor performance, and in some cases, the engine going into fail-safe or "limp" mode.

3. What causes the P1289 code to appear?

The code can be triggered by a faulty CHT sensor, damaged wiring or connectors, engine overheating, or issues with the engine control module (ECM).

4. Can a P1289 code cause engine damage?

Yes, if the code is caused by overheating, continued driving can lead to serious engine damage, such as warped cylinder heads or a blown head gasket.

5. How do I diagnose the P1289 code on my Ford F150?

Start by checking the CHT sensor and its wiring for damage or corrosion. Use a scan tool to monitor live data and compare the temperature readings against the expected range.

6. How do I fix a P1289 code?

Repairs may involve replacing the CHT sensor, repairing or replacing damaged wiring, flushing the cooling system, or addressing overheating issues like a faulty thermostat or water pump.

7. Where is the Cylinder Head Temperature sensor located on a 2001 Ford F150?

The CHT sensor is typically located in the cylinder head, near the engine block, and monitors the temperature of the engine's cylinder head.

8. Can a bad thermostat trigger a P1289 code?

Yes, a stuck closed thermostat can cause engine overheating, which may lead to the CHT sensor triggering the P1289 code.

9. Is it safe to drive with a P1289 code?

Itâ€™s not recommended to drive with this code, especially if the engine is overheating, as it can lead to severe engine damage.

10. How much does it cost to fix a P1289 code?

The repair cost can vary depending on the cause. Replacing the CHT sensor may cost $50-$150, while fixing overheating issues like a thermostat or water pump could be more expensive.