AutoCodesFord – P1289 2003 Ford F150

P1289 2003 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 2003 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 8,641
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 07, 2019
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Code P1289 2003 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 2003 Ford F150 - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range - AutoCodes.com
P1289 2003 Ford F150 Code - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range

What are the Possible Causes of the DTC P1289 2003 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 2003 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1289 2003 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 2003 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 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P1289 on a 2003 Ford F150?

- Common symptoms include engine overheating, poor fuel efficiency, rough idling, and potential stalling.

2. What does the OBDII code P1289 on a 2003 Ford F150 indicate?

- This code indicates that the Cylinder Head Temperature Sensor signal is registering a temperature outside the normal range during the self-test.

3. What are the possible causes of OBDII code P1289 on a 2003 Ford F150?

- Possible causes include a faulty Cylinder Head Temperature Sensor, wiring issues, a malfunctioning PCM (Powertrain Control Module), or a problem with the cooling system.

4. How can I diagnose the cause of OBDII code P1289 on my 2003 Ford F150?

- You can start by checking the wiring and connections to the Cylinder Head Temperature Sensor, testing the sensor itself for proper functionality, and inspecting the cooling system components for any issues.

5. Can I continue driving my 2003 Ford F150 with OBDII code P1289?

- It is not recommended to continue driving with this code present, as it can lead to engine overheating and potential damage if not addressed promptly.

6. How serious is OBDII code P1289 on a 2003 Ford F150?

- This code should be taken seriously, as it can lead to engine performance issues and overheating if left unresolved.

7. What are some repair tips for fixing OBDII code P1289 on a 2003 Ford F150?

- Repair tips include checking and replacing the Cylinder Head Temperature Sensor if faulty, inspecting and repairing any wiring issues, and ensuring the cooling system is functioning properly.

8. Can I reset OBDII code P1289 on my 2003 Ford F150 with a simple reset tool?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. How much does it typically cost to repair OBDII code P1289 on a 2003 Ford F150?

- The cost of repair can vary depending on the exact cause of the code, but it may involve replacing the Cylinder Head Temperature Sensor, fixing wiring problems, or addressing cooling system issues.

10. Will OBDII code P1289 on a 2003 Ford F150 cause the check engine light to illuminate?

- Yes, this code will trigger the check engine light to illuminate on the dashboard of your 2003 Ford F150.

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