AutoCodes – Ford – P1288 1998 Ford F150

P1288 1998 Ford F150 Code - Cylinder Head Temperature Sensor Out of 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: P1288 1998 Ford F150 indicates Cylinder Head Temperature Sensor Out of 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 3,589

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 Dec 23, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1288 1998 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 P1288 1998 Ford F150 - Cylinder Head Temperature Sensor Out of Self-Test Range - AutoCodes.com — P1288 1998 Ford F150 Code - Cylinder Head Temperature Sensor Out of Self-Test Range

What does this mean?

What are the Possible Causes of the DTC P1288 1998 Ford F150?

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

How to Fix the DTC P1288 1998 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

This indicates the Cylinder Head Temperature (CHT) sensor is out of the Self-Test range. The engine is not at a normal operating temperature.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1288 1998 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 P1288 1998 Ford F150 code?

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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 P1288 1998 Ford F150 Code

1. What does the OBDII code P1288 on a 1998 Ford F150 mean?

The code P1288 indicates that the Cylinder Head Temperature Sensor is out of the self-test range.

2. What are the common symptoms of a Cylinder Head Temperature Sensor malfunction in a 1998 Ford F150?

Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential overheating issues.

3. What are the possible causes of the P1288 code on a 1998 Ford F150?

Possible causes include a faulty Cylinder Head Temperature Sensor, wiring issues, a damaged sensor connector, or problems with the sensor circuit.

4. How can I diagnose the Cylinder Head Temperature Sensor issue on a 1998 Ford F150?

Diagnosing the problem involves inspecting the sensor and its wiring for any visible damage, testing the sensor's resistance, and checking for proper voltage to the sensor.

5. Can I drive my 1998 Ford F150 with the P1288 code present?

It is not recommended to drive your vehicle with the P1288 code active, as it can lead to further engine damage and potentially unsafe driving conditions.

6. How can I repair the Cylinder Head Temperature Sensor issue on my 1998 Ford F150?

Repairing the issue may involve replacing the Cylinder Head Temperature Sensor, repairing any damaged wiring or connections, and clearing the trouble codes from the vehicle's computer.

7. Are there any DIY tips for fixing the P1288 code on a 1998 Ford F150?

While some basic diagnostics can be done at home, it is recommended to consult a professional mechanic for accurate diagnosis and repair of the Cylinder Head Temperature Sensor issue.

8. How much does it typically cost to repair the Cylinder Head Temperature Sensor on a 1998 Ford F150?

The cost of repair can vary depending on the extent of the issue, but it may range from $100 to $300 for parts and labor.

9. Will resetting the trouble codes make the P1288 code go away on a 1998 Ford F150?

Resetting the trouble codes may temporarily clear the code, but if the underlying issue with the Cylinder Head Temperature Sensor is not addressed, the code is likely to reappear.

10. Can a faulty Cylinder Head Temperature Sensor cause other problems in a 1998 Ford F150?

Yes, a malfunctioning Cylinder Head Temperature Sensor can lead to poor engine performance, fuel efficiency issues, and potential overheating problems if left unresolved.