AutoCodes – Volkswagen – P1635 Volkswagen

P1635 Volkswagen Code - CAN Data Bus A/C No Signal

Quick Answer

P1635 Volkswagen indicates CAN Data Bus A/C No Signal. Common causes include Check for A/C control module trouble code(s). 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 Volkswagen indicates CAN Data Bus A/C No Signal.
Common causes: Common causes include Check for A/C control module trouble code(s).
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 16,056

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 Sep 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1635 Volkswagen Description

OBDII Code P1635 Volkswagen - CAN Data Bus A/C No Signal - AutoCodes.com — P1635 Volkswagen Code - CAN Data Bus A/C No Signal

What does this mean?

What are the Possible Causes of the DTC P1635 Volkswagen?

Check for A/C control module trouble code(s)

How to Fix the DTC P1635 Volkswagen?

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

Need Help with the Code?

Get the P1635 Volkswagen code diagnosed by a professional: Find a repair shop in your area

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 Volkswagen Code

1. What are the common symptoms of OBDII code P1635 in a Volkswagen related to the CAN Data Bus A/C No Signal issue?

The common symptoms include the air conditioning system not working properly, the climate control panel not responding, and the A/C compressor not engaging.

2. What are some possible causes of the CAN Data Bus A/C No Signal error code P1635 in a Volkswagen?

Possible causes include a faulty A/C control module, damaged wiring or connectors in the CAN bus system, a malfunctioning temperature sensor, or software issues.

3. How can I diagnose the OBDII code P1635 in my Volkswagen related to the CAN Data Bus A/C No Signal problem?

You can diagnose the issue by using a professional OBDII scanner to read the fault codes, inspecting the wiring and connectors in the CAN bus system, and performing a comprehensive check of the A/C control module.

4. Can I continue driving my Volkswagen with the OBDII code P1635 CAN Data Bus A/C No Signal error?

It is not recommended to drive with this error code, as it may lead to further damage to the A/C system and affect the overall performance of the vehicle.

5. Are there any quick repair tips for fixing the OBDII code P1635 in a Volkswagen with the CAN Data Bus A/C No Signal issue?

Quick repair tips include checking and cleaning the wiring connections, resetting the fault codes with a scanner, and ensuring proper functioning of the A/C controls.

6. Will resetting the error codes make the OBDII code P1635 related to the CAN Data Bus A/C No Signal disappear permanently?

Resetting the error codes may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair the OBDII code P1635 CAN Data Bus A/C No Signal issue in a Volkswagen?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Is it possible to fix the OBDII code P1635 related to the CAN Data Bus A/C No Signal at home, or should I take my Volkswagen to a professional mechanic?

While some basic checks and repairs can be done at home, diagnosing and fixing complex issues related to the CAN bus system and A/C controls may require professional expertise.

9. Can a low battery voltage trigger the OBDII code P1635 in a Volkswagen indicating a CAN Data Bus A/C No Signal problem?

Yes, a low battery voltage or electrical issues can sometimes trigger this code, so it's important to ensure the battery is in good condition and properly charged.

10. Are there any recalls or technical service bulletins related to the OBDII code P1635 Volkswagen CAN Data Bus A/C No Signal issue?

It's advisable to check with a Volkswagen dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or bulletins addressing this specific problem.