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AutoCodes – Ford – P1290 Ford

P1290 Ford Code - Cylinder Head Temperature Sensor Signal Less 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
P1290 Ford indicates Cylinder Head Temperature Sensor Signal Less 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 45,303
How popular is this code, among other codes? Medium
What is this?
Table of contents Created and updated by William Orellana on Aug 07, 2019
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Code P1290 Ford 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 P1290 Ford - Cylinder Head Temperature Sensor Signal Less Than Self-Test Range - AutoCodes.com
P1290 Ford Code - Cylinder Head Temperature Sensor Signal Less Than Self-Test Range
What does this mean?

What are the Possible Causes of the DTC P1290 Ford?

  • 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 P1290 Ford?

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 P1290 Ford 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 P1290 Ford code?

Need more information on how to fix the P1290 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1290 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

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 P1290 Ford Code

1. What are the common symptoms of OBDII code P1290 in a Ford vehicle?

The common symptoms of OBDII code P1290 in a Ford vehicle include engine overheating, rough idling, poor fuel efficiency, and potential stalling.

2. What does the OBDII code P1290 in a Ford indicate?

OBDII code P1290 in a Ford indicates that the Cylinder Head Temperature Sensor signal is less than the self-test range, suggesting a problem with the sensor or its circuit.

3. What are the possible causes of OBDII code P1290 in a Ford?

Possible causes of OBDII code P1290 in a Ford include a faulty Cylinder Head Temperature Sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine coolant system.

4. How can I diagnose the cause of OBDII code P1290 in my Ford vehicle?

To diagnose the cause of OBDII code P1290 in your Ford vehicle, you can start by checking the Cylinder Head Temperature Sensor for proper operation, inspecting the sensor wiring and connectors for damage, and testing the engine coolant system for any issues.

5. Can I continue driving my Ford with OBDII code P1290?

It is not recommended to continue driving your Ford with OBDII code P1290, as it can lead to potential engine damage due to overheating or improper fuel management. It is best to address the issue promptly.

6. How can I repair OBDII code P1290 in my Ford?

To repair OBDII code P1290 in your Ford, you may need to replace the Cylinder Head Temperature Sensor if it is faulty, repair any damaged wiring or connectors, and ensure proper functioning of the engine coolant system.

7. Is it possible to reset OBDII code P1290 in a Ford without fixing the underlying issue?

While you can clear the OBDII code P1290 with a diagnostic tool, it is essential to address the underlying issue causing the code to prevent further engine problems and ensure proper vehicle performance.

8. Can a DIY enthusiast fix OBDII code P1290 in a Ford at home?

A DIY enthusiast may be able to fix OBDII code P1290 in a Ford at home by following repair guides, using basic tools, and having some mechanical knowledge. However, complex issues may require professional assistance.

9. How much does it cost to repair OBDII code P1290 in a Ford at a mechanic?

The cost to repair OBDII code P1290 in a Ford at a mechanic can vary depending on the cause of the issue, the labor rates, and the cost of parts. It is recommended to obtain quotes from different mechanics for comparison.

10. Are there any preventive measures to avoid OBDII code P1290 in a Ford?

To prevent OBDII code P1290 in a Ford, you can follow a regular maintenance schedule, monitor the engine coolant system, and address any warning signs promptly to avoid potential sensor or circuit issues.

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