Engine-CodesFord – P1635 1997 Ford F150

P1635 1997 Ford F150 Code - Tire / Axle Ratio Out of Acceptable Range

Quick Answer

The P1635 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates that the tire/axle ratio is out of an acceptable range. Common causes include Incorrect tire size or pressure, Faulty wheel speed sensor, Malfunctioning ABS module. 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
P1635 1997 Ford F150 indicates Tire / Axle Ratio Out of Acceptable Range.
Common causes
Common causes include Incorrect tire size or pressure, Faulty wheel speed sensor, Malfunctioning ABS module.
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.
Table of contents Created and updated by William Orellana on Sep 05, 2024
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Code P1635 1997 Ford F150 Description

The P1635 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates that the tire/axle ratio is out of an acceptable range. This means that there is a discrepancy between the speed of the wheels and the speed of the vehicle, which can lead to inaccurate readings and affect the overall performance of the vehicle. The tire/axle ratio is crucial for the proper functioning of various systems in the vehicle, including the transmission, ABS, and traction control. If not addressed, this issue can lead to poor fuel efficiency, uneven tire wear, and potentially cause damage to the drivetrain components.

OBDII Code P1635 1997 Ford F150 - Tire / Axle Ratio Out of Acceptable Range
P1635 1997 Ford F150 Code - Tire / Axle Ratio Out of Acceptable Range

Common Causes of P1635 1997 Ford F150

  1. Incorrect tire size or pressure
  2. Faulty wheel speed sensor
  3. Malfunctioning ABS module
  4. Issues with the differential or axle components
  5. Electrical wiring or connection problems

Symptoms of P1635 1997 Ford F150

  1. Incorrect speedometer readings
  2. ABS or traction control warning lights illuminated
  3. Poor fuel efficiency
  4. Difficulty shifting gears
  5. Uneven tire wear

How to Fix P1635 1997 Ford F150

  1. Check and adjust tire pressure and size to ensure they are within specifications.
  2. Inspect and replace any faulty wheel speed sensors.
  3. Diagnose and repair any issues with the ABS module.
  4. Check the differential and axle components for wear or damage and replace if necessary.
  5. Inspect the electrical wiring and connections for any faults and repair as needed.

Cost to Fix P1635 1997 Ford F150

The typical repair costs for addressing a P1635 code in a 1997 Ford F150 can range from $200 to $800, depending on the specific cause of the issue and the parts/labour required. It's important to note that diagnosis time and labour rates can vary, so it's advisable to check with local auto repair shops for a more accurate estimate.

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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 P1635 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

The common symptoms include issues with the vehicle's speedometer accuracy, erratic shifting of gears, and possible illumination of the Check Engine Light.

2. What causes the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

This code is typically triggered when there is a discrepancy between the tire size and axle ratio programmed in the vehicle's computer, often due to modifications or incorrect settings.

3. How can I diagnose the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

Diagnosis involves checking the tire size and axle ratio settings in the vehicle's computer, verifying any modifications made, and ensuring they match the actual physical components on the vehicle.

4. Can I continue to drive my 1997 Ford F150 with the OBDII code P1635 related to Tire / Axle Ratio Out of Acceptable Range?

It is generally safe to drive the vehicle with this code, but it is recommended to address the underlying issue to prevent potential transmission or drivability problems.

5. How do I repair the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

The repair process involves correcting any tire size or axle ratio discrepancies in the vehicle's computer, ensuring they match the actual physical components installed on the vehicle.

6. Can resetting the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range fix the issue?

Resetting the code may temporarily clear the Check Engine Light, but if the underlying cause of the code is not addressed, it is likely to reappear.

7. Are there any specific tools needed to diagnose and repair the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

A diagnostic scanner capable of reading and clearing OBDII codes and accessing the vehicle's computer settings may be necessary for proper diagnosis and repair.

8. Can changing the tire size or axle ratio on my 1997 Ford F150 trigger the OBDII code P1635 related to Tire / Axle Ratio Out of Acceptable Range?

Yes, any modifications to the tire size or axle ratio that are not properly updated in the vehicle's computer can trigger this code.

9. How do I prevent the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range from recurring?

To prevent the code from reoccurring, ensure that any changes made to the tire size or axle ratio are accurately reflected in the vehicle's computer settings.

10. Is the OBDII code P1635 on a 1997 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range a common issue?

This code is not extremely common but can occur, especially after modifications to the vehicle's tire size or axle ratio.

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