AutoCodes – Ford – P1635 2003 Ford F150

P1635 2003 Ford F150 Code - Tire / Axle Ratio Out of Acceptable Range

Quick Answer

The All-Wheel Drive (AWD) system continuously monitors vehicle conditions and automatically adjusts the torque distribution between the front and rear wheels. Common causes include Incorrect tire size, Incorrect axle ratio, Incorrect Vehicle ID block configuration parameters. 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 2003 Ford F150 indicates Tire / Axle Ratio Out of Acceptable Range.
Common causes: Common causes include Incorrect tire size, Incorrect axle ratio, Incorrect Vehicle ID block configuration parameters.
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 4,062

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 Jul 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1635 2003 Ford F150 Description

The All-Wheel Drive (AWD) system continuously monitors vehicle conditions and automatically adjusts the torque distribution between the front and rear wheels. During normal operation, most of the torque is sent to the front wheels. If wheel slip between the front and rear wheels is detected or the vehicle is under heavy acceleration, the AWD system increases torque to the rear wheels. When the 4X4 control module detects inappropriate mini spare or road wheels/tires (greater than 7% across the front and rear axle or 14% at one wheel) installed, this Diagnostic Trouble Code (DTC) is set.

OBDII Code P1635 2003 Ford F150 - Tire / Axle Ratio Out of Acceptable Range - AutoCodes.com — P1635 2003 Ford F150 Code - Tire / Axle Ratio Out of Acceptable Range

What does this mean?

What are the Possible Causes of the DTC P1635 2003 Ford F150?

Incorrect tire size
Incorrect axle ratio
Incorrect Vehicle ID block configuration parameters

How to Fix the DTC P1635 2003 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1635 2003 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 P1635 2003 Ford F150 code?

Need more information on how to fix the P1635 2003 Ford F150 code? Get Access to Factory Service Manuals

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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 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P1635 on a 2003 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

The common symptoms include difficulty shifting gears, reduced fuel efficiency, and the vehicle may go into limp mode.

2. What can cause the OBDII code P1635 on a 2003 Ford F150 indicating Tire / Axle Ratio Out of Acceptable Range?

The code can be triggered by incorrect tire size, axle ratio changes, or issues with the speed sensors or wiring.

3. How can I diagnose the OBDII code P1635 on a 2003 Ford F150 related to Tire / Axle Ratio Out of Acceptable Range?

Diagnosis involves checking the tire sizes, verifying the axle ratio, inspecting the speed sensors, and scanning for any other related codes.

4. Can incorrect tire pressure lead to the OBDII code P1635 on a 2003 Ford F150 for Tire / Axle Ratio Out of Acceptable Range?

Incorrect tire pressure can impact the speed readings and potentially trigger the code, so it's important to ensure proper tire inflation.

5. What are some repair tips for addressing the OBDII code P1635 on a 2003 Ford F150 linked to Tire / Axle Ratio Out of Acceptable Range?

Repair tips include correcting tire size discrepancies, verifying axle ratio settings, checking and replacing faulty speed sensors, and resetting the code.

6. Will driving with the OBDII code P1635 on a 2003 Ford F150 displaying Tire / Axle Ratio Out of Acceptable Range cause any further damage?

Continued driving with this code may lead to issues with the vehicle's transmission and drivability, so it's recommended to address the problem promptly.

7. How can I reset the OBDII code P1635 on a 2003 Ford F150 indicating Tire / Axle Ratio Out of Acceptable Range after making the necessary repairs?

The code can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

8. Are there any recalls or technical service bulletins related to the OBDII code P1635 on a 2003 Ford F150 for Tire / Axle Ratio Out of Acceptable Range?

It's advisable to check with Ford dealership or online resources for any relevant recalls or technical service bulletins that may address this issue.