AutoCodes – Ford – P1289 2008 Ford Fusion

P1289 2008 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 2008 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.

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Code Popularity 3,852

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
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Code P1289 2008 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 2008 Ford Fusion - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range - AutoCodes.com — P1289 2008 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 2008 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 2008 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 2008 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 2008 Ford Fusion code?

Need more information on how to fix the P1289 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the 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 2008 Ford Fusion Code

What are the common symptoms of OBDII code P1289 on a 2008 Ford Fusion?

Common symptoms of OBDII code P1289 on a 2008 Ford Fusion may include engine overheating, rough idling, poor fuel economy, and a Check Engine Light illuminated on the dashboard.

What are the possible causes of OBDII code P1289 on a 2008 Ford Fusion?

Possible causes of OBDII code P1289 on a 2008 Ford Fusion include a faulty cylinder head temperature sensor, wiring or connector issues, a malfunctioning engine control module (ECM), or a problem with the cooling system.

How can I diagnose the issue related to OBDII code P1289 on my 2008 Ford Fusion?

To diagnose the issue related to OBDII code P1289 on your 2008 Ford Fusion, you can use a scan tool to retrieve the trouble code and then inspect the cylinder head temperature sensor, wiring connections, and coolant levels for any visible issues.

What are the repair options for fixing OBDII code P1289 on a 2008 Ford Fusion?

Repair options for fixing OBDII code P1289 on a 2008 Ford Fusion may include replacing the faulty cylinder head temperature sensor, repairing any damaged wiring or connectors, resetting the ECM, or addressing any cooling system issues.

Is it safe to continue driving my 2008 Ford Fusion with OBDII code P1289?

It is not recommended to continue driving your 2008 Ford Fusion with OBDII code P1289, as the issue could lead to engine overheating and potential damage if left unaddressed. It is best to have the vehicle inspected and repaired as soon as possible.

Can I reset the Check Engine Light triggered by OBDII code P1289 on my 2008 Ford Fusion?

You can reset the Check Engine Light triggered by OBDII code P1289 on your 2008 Ford Fusion by using a scan tool to clear the trouble code after addressing the underlying issue causing the fault code.

How much does it typically cost to repair OBDII code P1289 on a 2008 Ford Fusion?

The cost to repair OBDII code P1289 on a 2008 Ford Fusion can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

What can happen if OBDII code P1289 on a 2008 Ford Fusion is ignored?

Ignoring OBDII code P1289 on a 2008 Ford Fusion can lead to potential engine overheating, reduced fuel efficiency, and further damage to engine components if the underlying issue is not addressed promptly.

How often should the cylinder head temperature sensor be inspected on a 2008 Ford Fusion?

The cylinder head temperature sensor on a 2008 Ford Fusion should be inspected as part of regular maintenance routines or whenever symptoms related to engine temperature or performance issues are noticed.