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P0733 Chevrolet Code - Transmission 3rd Gear Ratio Incorrect

Quick Answer

The P0733 code for Chevrolet vehicles indicates that the transmission is experiencing an issue with the 3rd gear ratio being incorrect. Common causes include Low transmission fluid levels or dirty/contaminated fluid, Faulty transmission solenoid, Failing transmission control module. 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 Chevrolet indicates Transmission 3rd Gear Ratio Incorrect.
Common causes
Common causes include Low transmission fluid levels or dirty/contaminated fluid, Faulty transmission solenoid, Failing transmission control module.
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 07, 2024
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Code P0733 Chevrolet Description

The P0733 code for Chevrolet vehicles indicates that the transmission is experiencing an issue with the 3rd gear ratio being incorrect. This means that the transmission is not shifting properly into 3rd gear, which can lead to a variety of performance issues. The transmission control module (TCM) monitors the gear ratios during operation, and when it detects that the gear ratio for 3rd gear does not match the expected ratio, it triggers the P0733 code. This can result in poor acceleration, rough shifting, decreased fuel efficiency, and potential damage to the transmission over time.

OBDII Code P0733 Chevrolet - Transmission 3rd Gear Ratio Incorrect
P0733 Chevrolet Code - Transmission 3rd Gear Ratio Incorrect

Common Causes of P0733 Chevrolet

  1. Low transmission fluid levels or dirty/contaminated fluid
  2. Faulty transmission solenoid
  3. Failing transmission control module
  4. Worn out clutch components
  5. Mechanical issues within the transmission itself

Symptoms of P0733 Chevrolet

  1. Rough or delayed shifting between gears
  2. Slipping or jerking sensations during acceleration
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated on the dashboard

How to Fix P0733 Chevrolet

  1. Begin by checking the transmission fluid level and condition. If low, top off with the manufacturer recommended fluid. If dirty or contaminated, a fluid flush may be necessary.
  2. Inspect and test the transmission solenoid for proper function. Replace if found to be faulty.
  3. Check the transmission control module for any error codes or malfunctions. Reset or replace as needed.
  4. Inspect the clutch components for wear and tear. Replace any worn out parts.
  5. If the issue persists, further diagnostic testing may be necessary to pinpoint the exact cause of the incorrect 3rd gear ratio.

Cost to Fix P0733 Chevrolet

The cost of repairing a P0733 code can vary depending on the specific cause of the issue. On average, the repair could range from $200 to $1000 or more, including parts and labor. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Additionally, the cost of any necessary parts or diagnostic testing will be added to the total repair bill. It's recommended to obtain quotes from multiple repair shops to find the best price for the necessary repairs.

What does this mean?

Tech Notes for P0733 Chevrolet

Incorrect ratio Diagnostic Trouble Code (DTC) may indicate a component condition with piston seals, clutch plates, or solenoids or it may be caused by a faulty turbine or output speed sensor signal.

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Information for Specific Chevrolet Models

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 P0733 Chevrolet Code

1. What does OBDII code P0733 mean for a Chevrolet?

P0733 indicates that the transmission's third gear ratio is incorrect, meaning the gear isn't achieving the expected RPM or speed ratio during operation.

2. What are the common symptoms of P0733 on a Chevrolet?

Symptoms can include difficulty shifting gears, slipping in third gear, reduced acceleration, and the check engine light turning on.

3. What causes the P0733 code to appear on a Chevrolet?

Common causes include low transmission fluid, worn clutch packs, a faulty shift solenoid, damaged transmission bands, or internal transmission failures.

4. Can driving with P0733 damage my Chevrolet's transmission?

Yes, driving with this code can cause further damage to the transmission if the issue is not addressed promptly.

5. How can I fix the P0733 code on my Chevrolet?

Repairs may involve checking and refilling transmission fluid, replacing faulty solenoids, repairing internal transmission components, or performing a complete transmission rebuild.

6. How do I diagnose P0733 on a Chevrolet?

Diagnosis typically includes scanning for codes, checking the transmission fluid level and condition, inspecting the shift solenoids, and testing the transmission's internal components.

7. Can low transmission fluid cause P0733 on a Chevrolet?

Yes, low or contaminated transmission fluid can lead to incorrect gear ratios and trigger the P0733 code.

8. How much does it cost to repair P0733 on a Chevrolet?

The cost varies depending on the cause, ranging from $150 for fluid replacement to several thousand dollars for a full transmission rebuild.

9. Will clearing the P0733 code fix the issue on my Chevrolet?

Clearing the code may turn off the check engine light temporarily, but the underlying problem must be repaired to prevent the code from returning.

10. Is a software update ever needed for P0733 on a Chevrolet?

In rare cases, a transmission control module (TCM) software update may resolve the issue if incorrect programming is contributing to the problem.

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