Engine-CodesSaturn – P0735 Saturn

P0735 Saturn Code - Gear 5 Incorrect Ratio

Quick Answer

The P0735 diagnostic trouble code (DTC) for Saturn vehicles indicates that there is an issue with the transmission system, specifically with the gear 5 incorrect ratio. Common causes include Low transmission fluid level or dirty transmission fluid, Faulty transmission solenoid or sensor, Internal transmission damage or wear. 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 Saturn indicates Gear 5 Incorrect Ratio.
Common causes
Common causes include Low transmission fluid level or dirty transmission fluid, Faulty transmission solenoid or sensor, Internal transmission damage or wear.
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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0735 Saturn Description

The P0735 diagnostic trouble code (DTC) for Saturn vehicles indicates that there is an issue with the transmission system, specifically with the gear 5 incorrect ratio. This means that the transmission is not shifting into the correct gear ratio when the vehicle is in fifth gear. The transmission control module (TCM) monitors the gear ratio to ensure that the engine speed and vehicle speed are in sync. When the TCM detects that the gear ratio is not within the specified parameters, it triggers the P0735 code. This can lead to poor vehicle performance, decreased fuel efficiency, and potential long-term damage to the transmission system if not addressed promptly.

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

Common Causes of P0735 Saturn

  1. Low transmission fluid level or dirty transmission fluid
  2. Faulty transmission solenoid or sensor
  3. Internal transmission damage or wear
  4. Wiring or electrical issues in the transmission system
  5. Software or programming issues with the TCM

Symptoms of P0735 Saturn

  1. Delayed or harsh shifting when going into fifth gear
  2. Slipping or jerking when accelerating in fifth gear
  3. Engine revving higher than normal while driving at a constant speed in fifth gear
  4. Check Engine Light illuminated on the dashboard
  5. Decreased fuel efficiency

How to Fix P0735 Saturn

  1. Check and top up transmission fluid levels, and perform a transmission fluid flush if necessary.
  2. Inspect and replace any faulty transmission solenoids or sensors.
  3. Perform a thorough diagnostic check of the transmission system to identify any internal damage or wear, and repair or replace as needed.
  4. Check and repair any wiring or electrical issues in the transmission system.
  5. Update or reprogram the TCM software to ensure proper gear ratio calibration.

Cost to Fix P0735 Saturn

The typical repair costs for addressing a P0735 code can vary depending on the specific cause of the issue. In general, the cost can range from $200 to $1500, including parts and labor. This estimate does not include diagnostic fees, which can vary based on the location and type of repair shop. It's advisable to consult with a professional mechanic to get a more accurate estimate based on your vehicle's make and model.

Tech Notes for P0735 Saturn

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.

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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.

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