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Engine-Codes – Generic – P0735

P0735 Code - Gear 5 Incorrect ratio

Quick Answer

The diagnostic trouble code P0735 indicates that the transmission's fifth gear has an incorrect ratio. Common causes include Low transmission fluid level or poor quality fluid, Faulty transmission solenoid, Worn out or damaged clutch components. 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 indicates Gear 5 Incorrect ratio.
Common causes
Common causes include Low transmission fluid level or poor quality fluid, Faulty transmission solenoid, Worn out or damaged clutch components.
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 Aug 18, 2024
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Code P0735 Description

The diagnostic trouble code P0735 indicates that the transmission's fifth gear has an incorrect ratio. This means that the transmission is not shifting into fifth gear properly, which can lead to issues with the vehicle's performance and fuel efficiency. When this code is triggered, it can cause the vehicle to experience harsh shifting, slipping gears, decreased acceleration, and potentially even stalling. If not addressed promptly, it can lead to further damage to the transmission system and result in costly repairs.

OBDII Code P0735 - Gear 5 Incorrect ratio
P0735 Code - Gear 5 Incorrect ratio

Common Causes of P0735

  1. Low transmission fluid level or poor quality fluid
  2. Faulty transmission solenoid
  3. Worn out or damaged clutch components
  4. Issues with the transmission control module
  5. Mechanical problems within the transmission gears

Symptoms of P0735

  1. Harsh shifting between gears
  2. Slipping gears while driving
  3. Decreased acceleration and power
  4. Engine revving higher than usual
  5. Possible stalling or difficulty engaging gears

How to Fix P0735

  1. Check and top up transmission fluid levels
  2. Inspect and potentially replace the transmission solenoid
  3. Examine and replace worn out clutch components
  4. Test and possibly reprogram the transmission control module
  5. Repair or replace any damaged transmission gears

Cost to Fix P0735

The cost of repairing the P0735 code can vary depending on the exact cause of the issue and the specific vehicle. On average, the repair costs for this type of transmission problem can range from $500 to $1500, including parts and labor. Additional costs may be incurred if more extensive repairs or replacements are needed. It's recommended to consult with a qualified mechanic or transmission specialist for a more accurate cost estimate based on your vehicle's make and model. Labor rates at auto repair shops can vary, so it's advisable to check local rates for a precise estimate.

What does this mean?

Tech Notes for P0735

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 code?

Need more information on how to fix the P0735 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0735 code diagnosed by a professional: Find a repair shop in your area

Code P0735 Information for Specific Makes

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 Code

1. What does the OBDII code P0735 mean?

P0735 indicates that the transmission is experiencing an incorrect gear ratio in 5th gear, often due to mechanical or electrical issues.

2. What are the common symptoms of code P0735?

Symptoms include transmission slipping, difficulty shifting into 5th gear, reduced fuel efficiency, and the check engine light being illuminated.

3. What causes the P0735 code?

Common causes include low transmission fluid, worn clutch packs, a faulty shift solenoid, damaged transmission bands, or a malfunctioning transmission control module (TCM).

4. Can I drive my car with a P0735 code?

Driving with a P0735 code is not recommended as it can cause further damage to the transmission and lead to unsafe driving conditions.

5. How is the P0735 code diagnosed?

A mechanic will check the transmission fluid level, inspect for mechanical damage, test the shift solenoids, and use a scan tool to monitor transmission data.

6. How do I fix the P0735 code?

Repairs may involve replacing the shift solenoid, refilling or flushing transmission fluid, repairing internal transmission components, or reprogramming the TCM.

7. Can low transmission fluid cause the P0735 code?

Yes, low or contaminated transmission fluid can disrupt proper gear engagement and lead to an incorrect gear ratio.

8. How much does it cost to repair the P0735 code?

Costs vary widely, ranging from $100 for a fluid change to several thousand dollars for a transmission rebuild, depending on the severity of the issue.

9. Will a P0735 code cause long-term damage?

If left unaddressed, a P0735 code can cause significant damage to the transmission, leading to more expensive repairs.

10. Can a faulty TCM trigger the P0735 code?

Yes, a malfunctioning transmission control module can send incorrect signals, causing gear ratio errors like P0735.

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