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Engine-Codes – Audi – P0735 Audi

P0735 Audi Code - Gear 5 Incorrect Ratio

Quick Answer

The P0735 diagnostic trouble code (DTC) for Audi vehicles indicates a problem with the transmission's fifth gear ratio. Common causes include Faulty transmission solenoid, Worn or damaged transmission gear, Low transmission fluid levels. 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
P0735 Audi indicates Gear 5 Incorrect Ratio.
Common causes
Common causes include Faulty transmission solenoid, Worn or damaged transmission gear, Low transmission fluid levels.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0735 Audi Description

The P0735 diagnostic trouble code (DTC) for Audi vehicles indicates a problem with the transmission's fifth gear ratio. This means that the transmission is not shifting into fifth gear properly, resulting in incorrect gear ratios being engaged. This can lead to a variety of performance issues, including poor acceleration, decreased fuel efficiency, and potential damage to the transmission over time.

OBDII Code P0735 Audi - Gear 5 Incorrect Ratio
P0735 Audi Code - Gear 5 Incorrect Ratio

Common Causes of P0735 Audi

  1. Faulty transmission solenoid
  2. Worn or damaged transmission gear
  3. Low transmission fluid levels
  4. Issues with the transmission control module
  5. Electrical or wiring issues within the transmission system

Symptoms of P0735 Audi

  1. Rough or delayed shifting between gears
  2. Engine revving but vehicle not accelerating as expected
  3. Decreased fuel efficiency
  4. Illuminated Check Engine Light
  5. Transmission slipping or jerking during gear changes

How to Fix P0735 Audi

  1. Perform a thorough diagnostic scan to retrieve the specific DTC and pinpoint the cause of the issue.
  2. Inspect the transmission fluid level and quality, topping off or replacing as needed.
  3. Check the transmission solenoid and gear components for any signs of wear or damage, replacing as necessary.
  4. Test the transmission control module for proper function and reprogram or replace if required.
  5. Clear the DTC from the vehicle's memory and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P0735 Audi

The typical repair costs for addressing a P0735 DTC can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a transmission solenoid or repairing a damaged gear can cost anywhere from $200 to $600, while reprogramming or replacing a transmission control module may range from $500 to $1000. Labor costs can also add to the overall expense, with hourly rates typically ranging from $80 to $150. It's advisable to consult with a trusted auto repair shop for a more accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P0735 Audi

Start by inspecting the transmission fluid level and condition, and change fluid if necessary.

When is the Code Detected?

P0735 is detected when A/T cannot be shifted to the 5th gear position even if electrical circuit is good.

Need more information about the P0735 Audi code?

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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 P0735 Audi Code

1. What are the common symptoms of OBDII code P0735 in an Audi indicating Gear 5 Incorrect Ratio?

- Common symptoms include harsh shifting into or out of gear, slipping in gear 5, decreased fuel efficiency, and the transmission may go into limp mode.

2. What are the possible causes of OBDII code P0735 in an Audi?

- Possible causes include a faulty transmission shift solenoid, low transmission fluid level or quality, worn clutch components, damaged wiring, or a malfunctioning transmission control module.

3. How can I diagnose the underlying issue causing OBDII code P0735 in my Audi?

- Diagnose the issue by performing a thorough inspection of the transmission fluid level and condition, checking for any visible wiring damage, and conducting a scan tool test to monitor transmission sensor data.

4. Can low transmission fluid cause OBDII code P0735 in an Audi?

- Yes, low transmission fluid can lead to gear ratio errors, including the incorrect ratio in gear 5, triggering OBDII code P0735 in an Audi.

5. Is it safe to continue driving my Audi with OBDII code P0735 indicating Gear 5 Incorrect Ratio?

- It is not recommended to continue driving with this code as it can lead to further transmission damage. It is best to address the underlying issue promptly.

6. How can I repair OBDII code P0735 in my Audi at home?

- You may attempt to repair this code at home by checking and refilling the transmission fluid to the proper level, inspecting and replacing any damaged wiring, or resetting the transmission control module.

7. Will resetting the transmission control module clear OBDII code P0735 in my Audi?

- Resetting the transmission control module may temporarily clear the code, but if the underlying issue causing the incorrect gear ratio in gear 5 is not resolved, the code is likely to return.

8. Can a transmission flush help resolve OBDII code P0735 in my Audi?

- A transmission flush may help if the issue is related to dirty or degraded transmission fluid. However, if the problem lies with mechanical components, a flush may not resolve OBDII code P0735.

9. How much does it typically cost to repair OBDII code P0735 in an Audi at a professional auto repair shop?

- The cost of repairing OBDII code P0735 can vary depending on the exact cause. Repairs may range from a few hundred to over a thousand dollars, so it is recommended to obtain quotes from reputable repair shops.

10. Can a faulty transmission control module cause OBDII code P0735 in an Audi?

- Yes, a malfunctioning transmission control module can lead to incorrect gear ratios, including gear 5, triggering OBDII code P0735 in an Audi.

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