AutoCodes – Ford – P1289 1997 Ford F150

P1289 1997 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 1997 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 4,511

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 1997 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 1997 Ford F150 - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range - AutoCodes.com — P1289 1997 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 1997 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 1997 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 1997 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 1997 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 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P1289 on a 1997 Ford F150?

The common symptoms of code P1289 include engine overheating, rough idling, decreased fuel efficiency, and potential stalling.

2. What does the OBDII code P1289 indicate on a 1997 Ford F150?

Code P1289 indicates that the Cylinder Head Temperature Sensor signal is greater than the self-test range, suggesting a problem with the sensor or its wiring.

3. What are the possible causes of OBDII code P1289 on a 1997 Ford F150?

Possible causes of code P1289 include a faulty Cylinder Head Temperature Sensor, damaged sensor wiring, a poor electrical connection, or a malfunctioning PCM (Powertrain Control Module).

4. How can I diagnose the OBDII code P1289 on my 1997 Ford F150?

Diagnosing code P1289 involves inspecting the Cylinder Head Temperature Sensor and its wiring for any visible damage, testing the sensor's resistance, and checking for proper voltage supply.

5. Can I continue driving my 1997 Ford F150 with OBDII code P1289?

It is not recommended to drive your vehicle with code P1289, as it can lead to engine overheating and potential damage. It's best to address the issue promptly to avoid further complications.

6. How do I repair OBDII code P1289 on a 1997 Ford F150?

To repair code P1289, you may need to replace the Cylinder Head Temperature Sensor, repair any damaged wiring, ensure a proper electrical connection, or address any PCM issues as necessary.

7. Is it possible to reset OBDII code P1289 on a 1997 Ford F150 without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely resurface. It's essential to diagnose and repair the problem for a permanent solution.

8. How urgent is it to address OBDII code P1289 on a 1997 Ford F150?

Addressing code P1289 promptly is crucial to prevent potential engine damage due to overheating. Ignoring the issue could lead to more severe problems and costly repairs in the future.

9. Can a DIY enthusiast fix OBDII code P1289 on a 1997 Ford F150?

Depending on your mechanical skills and access to tools, DIY enthusiasts may be able to address code P1289 by following repair guides and using proper diagnostic equipment. However, professional assistance is recommended for complex issues.

10. How can I prevent OBDII code P1289 from occurring on my 1997 Ford F150 in the future?

Regular maintenance, such as checking and replacing sensors as needed, inspecting wiring for damage, and addressing any engine overheating issues promptly, can help prevent code P1289 from occurring on your Ford F150.