AutoCodes – Ford – P1289 2010 Ford Fusion

P1289 2010 Ford Fusion 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 2010 Ford Fusion 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 8,569

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
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1289 2010 Ford Fusion 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 2010 Ford Fusion - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range - AutoCodes.com — P1289 2010 Ford Fusion Code - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range

What does this mean?

What are the Possible Causes of the DTC P1289 2010 Ford Fusion?

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 2010 Ford Fusion?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1289 2010 Ford Fusion 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 2010 Ford Fusion code?

Need more information on how to fix the P1289 2010 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1289 2010 Ford Fusion code diagnosed by a professional: Find a repair shop in your area

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 2010 Ford Fusion Code

1. What are the common symptoms of OBDII code P1289 on a 2010 Ford Fusion?

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

2. What does the OBDII code P1289 "Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range" mean in a 2010 Ford Fusion?

This code indicates that the cylinder head temperature sensor is sending a signal that is outside the acceptable range set by the vehicle's self-test system.

3. What are the possible causes of OBDII code P1289 on a 2010 Ford Fusion?

Possible causes of code P1289 include a faulty cylinder head temperature sensor, wiring issues, a damaged sensor connector, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P1289 on my 2010 Ford Fusion?

Diagnosing code P1289 involves checking the cylinder head temperature sensor, inspecting the related wiring and connector for damage, and testing the sensor's resistance and voltage output.

5. Can I continue driving my 2010 Ford Fusion with OBDII code P1289?

It is not recommended to drive your vehicle with code P1289 present, as it can lead to potential engine damage or overheating issues. It is best to address the underlying problem as soon as possible.

6. How do I repair OBDII code P1289 on a 2010 Ford Fusion?

Repairs for code P1289 may involve replacing the cylinder head temperature sensor, repairing any damaged wiring or connectors, or reprogramming the ECM if necessary.

7. Will resetting the OBDII code P1289 on a 2010 Ford Fusion make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing P1289 is not resolved, the code is likely to reappear after driving the vehicle.

8. Is it safe to clear the OBDII code P1289 and ignore it on a 2010 Ford Fusion?

Ignoring code P1289 can lead to potential engine problems and reduced performance. It is essential to address the issue causing the code for the vehicle's proper functioning.

9. Can a DIY enthusiast fix OBDII code P1289 on a 2010 Ford Fusion?

If you have the necessary tools, knowledge, and experience, you may be able to diagnose and repair code P1289 yourself. However, it is recommended to consult a qualified mechanic for accurate diagnosis and repair.

10. How much does it typically cost to repair OBDII code P1289 on a 2010 Ford Fusion?

The cost of repairing code P1289 can vary depending on the cause of the issue, parts needed for replacement, and labor charges. It is advisable to get a few quotes from repair shops to determine the total cost.