Engine-CodesLexus – P0733 Lexus

P0733 Lexus Code - Gear 3 Incorrect Ratio

Quick Answer

The P0733 diagnostic trouble code (DTC) for Lexus vehicles indicates that there is an incorrect gear ratio in the transmission's third gear. Common causes include Low or dirty transmission fluid, Faulty transmission solenoids, Malfunctioning transmission sensor. 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
P0733 Lexus indicates Gear 3 Incorrect Ratio.
Common causes
Common causes include Low or dirty transmission fluid, Faulty transmission solenoids, Malfunctioning transmission sensor.
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 P0733 Lexus Description

The P0733 diagnostic trouble code (DTC) for Lexus vehicles indicates that there is an incorrect gear ratio in the transmission's third gear. This means that the transmission is not shifting properly into the designated gear, leading to issues with the vehicle's performance and drivability. When the transmission fails to engage the correct gear ratio, it can result in poor acceleration, reduced fuel efficiency, and potential damage to the transmission components over time.

OBDII Code P0733 Lexus - Gear 3 Incorrect Ratio
P0733 Lexus Code - Gear 3 Incorrect Ratio

Common Causes of P0733 Lexus

  1. Low or dirty transmission fluid
  2. Faulty transmission solenoids
  3. Malfunctioning transmission sensor
  4. Wiring or electrical issues in the transmission system
  5. Mechanical problems within the transmission itself

Symptoms of P0733 Lexus

  1. Delayed or harsh shifting between gears
  2. Engine revving but vehicle not accelerating as expected
  3. Slipping gears while driving
  4. Transmission overheating
  5. Illumination of the check engine light

How to Fix P0733 Lexus

  1. Check and replace the transmission fluid if it is low or dirty.
  2. Inspect and replace any faulty transmission solenoids.
  3. Test and replace the transmission sensor if necessary.
  4. Check for any wiring or electrical issues in the transmission system and repair as needed.
  5. If mechanical problems are found within the transmission, a rebuild or replacement may be necessary.

Cost to Fix P0733 Lexus

The cost of repairing a P0733 code on a Lexus will vary depending on the specific cause of the issue. Typically, the cost of replacing transmission solenoids can range from $300 to $700, while replacing the transmission sensor can cost between $200 and $500. If a transmission rebuild or replacement is required, the cost can amount to several thousand dollars. It is important to factor in labor costs, which can range from $80 to $150 per hour. Overall, addressing this issue promptly can help prevent further damage and potentially save money in the long run.

Tech Notes for P0733 Lexus

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

When is the Code Detected?

P0733 is detected when A/T cannot be shifted to the 3rd 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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