P1635 1999 Ford F150 Code - Tire / Axle Ratio Out of Acceptable Range
Quick Answer
The P1635 diagnostic trouble code (DTC) in a 1999 Ford F150 indicates that the tire or axle ratio is out of an acceptable range. Common causes include Incorrect tire size installation, Aftermarket axle modifications, Faulty wheel speed sensors. 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 1999 Ford F150 indicates Tire / Axle Ratio Out of Acceptable Range.
- Common causes
- Common causes include Incorrect tire size installation, Aftermarket axle modifications, Faulty wheel speed sensors.
- 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 P1635 1999 Ford F150 Description
The P1635 diagnostic trouble code (DTC) in a 1999 Ford F150 indicates that the tire or axle ratio is out of an acceptable range. This code is typically triggered when the vehicle's computer detects a discrepancy between the expected tire size or axle ratio and the actual values being reported by the sensors. This discrepancy can lead to inaccurate readings and affect the vehicle's performance, fuel efficiency, and overall drivability.
Common Causes of P1635 1999 Ford F150
- Incorrect tire size installation
- Aftermarket axle modifications
- Faulty wheel speed sensors
- Wiring issues in the ABS or traction control system
- Malfunctioning computer system
Symptoms of P1635 1999 Ford F150
- Illumination of the Check Engine Light
- Inaccurate speedometer readings
- Difficulty shifting gears
- Reduced fuel efficiency
- Traction control or ABS system malfunctions
How to Fix P1635 1999 Ford F150
- Use a diagnostic scanner to retrieve the specific tire or axle ratio causing the issue.
- Inspect the tires to ensure they are the correct size and properly inflated.
- Check the axle ratio to verify if any modifications have been made.
- Test the wheel speed sensors and wiring for any faults or damage.
- Reset the computer system and clear the DTC to see if the issue persists.
Cost to Fix P1635 1999 Ford F150
The typical repair costs for addressing a P1635 code in a 1999 Ford F150 can range from $100 to $500, depending on the specific cause of the issue and the required repairs. This estimate includes parts and labor, but actual costs may vary based on the location, vehicle make and model, and the rates of the auto repair shop. It is recommended to consult with a professional mechanic to get an accurate quote for the repair.
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Frequently Asked Questions about P1635 1999 Ford F150 Code
1. What are the common symptoms of OBDII code P1635 on a 1999 Ford F150 related to tire/axle ratio out of acceptable range?
The common symptoms include incorrect speedometer readings, issues with traction control, and potential drivability issues.
2. What could cause the OBDII code P1635 on a 1999 Ford F150 indicating tire/axle ratio out of acceptable range?
The code P1635 is typically triggered by a mismatch between the programmed tire size and axle ratio in the vehicle's computer.
3. How can I diagnose the OBDII code P1635 on my 1999 Ford F150?
You can diagnose the code P1635 by using an OBDII scanner to retrieve the code and checking the tire size and axle ratio settings in the vehicle's computer.
4. Can driving with the OBDII code P1635 on a 1999 Ford F150 cause any long-term damage?
Driving with the code P1635 is not recommended as it can lead to inaccurate speedometer readings and affect the vehicle's traction control system, potentially causing further issues.
5. What are the repair options for fixing the OBDII code P1635 on a 1999 Ford F150?
To repair the code P1635, you will need to correct the tire size and axle ratio settings in the vehicle's computer using a diagnostic tool or seek assistance from a professional mechanic.
6. Are there any DIY tips for resolving the OBDII code P1635 on a 1999 Ford F150?
If you are comfortable with vehicle diagnostics, you can try recalibrating the tire size and axle ratio settings using an OBDII scanner and the appropriate tools.
7. How critical is it to address the OBDII code P1635 on a 1999 Ford F150 promptly?
It is important to address the code P1635 promptly to ensure accurate speedometer readings and proper functioning of the vehicle's traction control system.
8. Can resetting the OBDII system clear the P1635 code on a 1999 Ford F150 related to tire/axle ratio issues?
Resetting the OBDII system may temporarily clear the code, but it will likely reappear until the underlying tire size and axle ratio settings are corrected.
9. Is the OBDII code P1635 related to tire/axle ratio out of acceptable range a common issue in 1999 Ford F150 trucks?
The P1635 code related to tire/axle ratio issues is not uncommon in older vehicles like the 1999 Ford F150, especially if modifications have been made to the tire size or axle ratio.
10. Can a malfunction in the speed sensor trigger the OBDII code P1635 on a 1999 Ford F150?
Yes, a malfunctioning speed sensor can sometimes cause the code P1635 to be triggered due to inaccurate speed readings affecting the tire/axle ratio calculations.
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