P1635 Ford 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 Ford 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.
Code P1635 Ford Description
What are the Possible Causes of the DTC P1635 Ford?
- Incorrect tire size
- Incorrect axle ratio
- Incorrect Vehicle ID block configuration parameters
How to Fix the DTC P1635 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.
Code Tech Notes
After a new Powertrain Control Module (PCM) has been installed, the Vehicle Identification (VID) block must be programmed into the PCM.
There is a Factory Service Bulletin for the following Ford models:
2013-2018 Ford C-MAX Hybrid
2008-2012 Ford Crown Victoria
2008-2019 Ford E-Series
2008-2019 Ford Edge
2008-2019 Ford Escape
2008-2019 Ford Expedition
2008-2019 Ford Explorer
2008-2011 Ford Explorer Sport Trac
2008-2019 Ford F-150
2008-2019 Ford F-Super Duty
2016-2019 Ford F-650/750
2008-2009 Ford F-53 Motorhome Chassis / F-59 Commercial Stripped Chassis
2011-2019 Ford F-53 Motorhome Chassis / F-59 Commercial Stripped Chassis
2011-2019 Ford Fiesta
2008-2009 Ford Five Hundred
2009-2019 Ford Flex
2008-2018 Ford Focus
2008-2019 Ford Fusion
2008-2019 Ford Mustang
2010-2019 Ford Police Interceptor - Sedan
2011-2019 Ford Police Interceptor - Utility
2008-2011 Ford Ranger
2019 Ford Ranger
2010-2019 Ford Taurus
2008-2009 Ford Taurus X
2014-2019 Ford Transit
2013-2019 Ford Transit Connect
Ford Factory Service Bulletin OBDII Code P1635
There is a Factory Service Bulletin for some 1999-2022 Ford models:
Ford Factory Service Bulletin OBDII Code P1635
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1635 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.
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Information for Specific Ford Models
- P1635 1997 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 1998 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 1999 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 2000 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 2001 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 2002 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 2003 Ford F150 — Tire / Axle Ratio Out of Acceptable Range
- P1635 2006 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
- P1635 2007 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
- P1635 2008 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
- P1635 2009 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
- P1635 2010 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
- P1635 2011 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
- P1635 2012 Ford Fusion — Tire / Axle Ratio Out of Acceptable Range
Frequently Asked Questions about P1635 Ford Code
1. What are the common symptoms of OBDII code P1635 Ford related to Tire / Axle Ratio Out of Acceptable Range?
Vehicles may experience issues like poor fuel economy, hesitation during acceleration, or incorrect speedometer readings.
2. What can cause the OBDII code P1635 Ford to be triggered?
This code is typically triggered when there is a mismatch between the tire size and axle ratio programmed into the vehicle's powertrain control module (PCM).
3. How can I diagnose the cause of OBDII code P1635 Ford?
You can start by checking the tire size and axle ratio settings in the PCM to ensure they match the actual specifications of the vehicle. Additionally, inspecting the speed sensor and related wiring can help identify any issues.
4. Can a DIYer repair OBDII code P1635 Ford at home?
If the issue is simply a matter of correcting the tire size or axle ratio settings in the PCM, it may be possible for a knowledgeable DIYer to address the problem. However, for more complex issues, professional diagnostic equipment may be needed.
5. What are the potential risks of ignoring OBDII code P1635 Ford?
Ignoring this code can lead to inaccurate speedometer readings, which can affect driving safety and potentially cause further damage to the vehicle's drivetrain components.
6. Is it safe to drive with OBDII code P1635 Ford active?
While the vehicle may still be operable with this code present, it is not recommended to ignore it, as it can lead to performance issues and inaccuracies in speed and mileage readings.
7. How much does it typically cost to repair OBDII code P1635 Ford?
The cost of repairing this code can vary depending on the root cause of the issue. It may range from a simple adjustment of settings to more complex repairs involving sensors or wiring.
8. Can resetting the PCM clear OBDII code P1635 Ford?
Resetting the PCM may temporarily clear the code, but if the underlying issue, such as a tire size or axle ratio mismatch, is not addressed, the code is likely to reappear.
9. Will replacing the speed sensor fix OBDII code P1635 Ford?
While a faulty speed sensor can contribute to this issue, simply replacing the sensor may not always resolve the problem. It's crucial to diagnose the root cause accurately before proceeding with any repairs.
10. How can I prevent OBDII code P1635 Ford from recurring in the future?
Regularly checking and ensuring that the tire size and axle ratio settings are correctly programmed into the PCM, especially after any modifications or upgrades, can help prevent this code from reoccurring.
Discuss the causes and fixes for P1635 Ford OBDII Code
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FORD Dealership has replaced the transmission control module and engine control module, still shows the code P1635. Also shows, U0401E0ABS
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Ford dealership has reprogrammed my PCM 2008 Ford Taurus X. code shows P1635 and P1639 code. traction control lights ang engine lights went on.
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Unfortunately, I haven't had that problem before. I did some research and the most common problem for both codes is the PCM. All the records shows that replacing the PCM fixed the problem.
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