P0733 – Gear 3 Incorrect Ratio: Troubleshooting and Repair Guide

Welcome to our comprehensive guide on the P0733 error code, which indicates a problem with the third gear in your vehicle’s automatic transmission. If you’re experiencing issues with gear shifting, gear misalignment, or gear slippage, this article will provide you with essential information on diagnosing and repairing this transmission error.

Key Takeaways:

• P0733 error code refers to a problem with the third gear in the automatic transmission
• Common symptoms include lack of engine power, slow speeds, and erratic shifts
• Causes can range from low transmission fluid to control module failure
• Diagnostic steps involve checking fluid levels, inspecting for leaks, and testing sensors
• Repair options include solenoid replacement, fluid and filter changes, or transmission overhaul

Common Symptoms of P0733

When encountering the P0733 error code, it is essential to be aware of the various symptoms that may arise. Identifying these symptoms can help diagnose the underlying issue with the third gear in the transmission. Here are the most common symptoms associated with P0733 – Gear 3 Incorrect Ratio:

1. An intermittent condition: The error code may appear sporadically, making it challenging to pinpoint the exact cause.
2. Lack of engine power: You may experience a noticeable decrease in power, making acceleration more difficult.
3. Slow speeds: The vehicle may struggle to reach and maintain higher speeds, hindering its overall performance.
4. Transmission slipping: The gears may slip or struggle to engage properly, resulting in rough shifting.
5. Erratic shifts: The transmission may exhibit unpredictable shifting patterns, making it challenging to drive smoothly.
6. Harsh shifts: The transitions between gears may feel abrupt, causing discomfort and potential damage to the transmission.

If you experience any of these symptoms, it is crucial to address them promptly and seek appropriate diagnosis and repairs to ensure the smooth operation of your vehicle.

Causes of P0733

The P0733 error code can be attributed to a variety of underlying causes, each requiring a specific diagnosis and approach for effective resolution.

Low Transmission Fluid Level

Insufficient transmission fluid can lead to inadequate lubrication and cooling, resulting in gear shifting issues. Regular fluid checks and maintenance are crucial to prevent this problem.

Dirty Transmission Fluid

Contaminated or degraded transmission fluid can negatively impact gear engagement, leading to incorrect gear ratios. Flushing the transmission system and replacing the old fluid with fresh fluid can help resolve this issue.

Transmission Oil Leaks

Leaks in the transmission system can cause a loss of fluid, leading to improper lubrication and potential gear slippage. Identifying and repairing any leaks is essential for optimal transmission performance.

Transmission Clutch Problems

A malfunctioning or worn-out transmission clutch can result in gear misalignment, leading to the P0733 error code. Proper diagnosis and repair of the clutch assembly are necessary to address this issue effectively.

Low Oil Pressure

Inadequate oil pressure within the transmission can disrupt the gear shifting process, causing gear ratio problems. Identifying the root cause of the low oil pressure and rectifying it is vital for resolving the P0733 error code.

Transmission Control Module Failure

A faulty transmission control module can lead to incorrect gear ratio calculations and subsequent gear shifting issues. Diagnosing and replacing the module may be necessary to fix the P0733 error code.

Transmission Speed Sensor Failure

Malfunctioning speed sensors can disrupt the transmission’s ability to monitor vehicle speed accurately, resulting in gear ratio problems. Testing and replacing the faulty speed sensor can help restore normal operation.

PCM Failure

Failure of the powertrain control module (PCM) can impact the transmission’s communication and control, leading to gear shifting abnormalities. Diagnosis and replacement of the PCM may be required to resolve this issue.

Corroded Connections or Pins

Corrosion or damage to transmission-related electrical connections and pins can interfere with the transmission’s signals, causing gear ratio discrepancies. Cleaning or repairing the affected connections can help rectify the problem.

Wiring Issues

Faulty or damaged wiring within the transmission system can disrupt communication and lead to gear shifting problems. Thorough inspection and repair of the wiring harness can be necessary to fix the P0733 error code.

It is essential to accurately diagnose the specific cause of the P0733 error code in order to implement the appropriate repairs and ensure the proper functioning of the transmission system.

How to Diagnose P0733

Diagnosing the P0733 error code involves a systematic approach to identify the underlying transmission issue. Here are the steps to diagnose the P0733 – Gear 3 Incorrect Ratio:

1. Check the transmission fluid level and condition: Begin by locating the transmission dipstick and measuring the fluid level. The transmission fluid should be at the correct level and have a clean appearance. If the fluid level is low or appears dirty, it may indicate a transmission problem.
2. Inspect the transmission for damage or leaks: Visually inspect the transmission for any signs of damage, such as cracks or leaks. Leaking fluid can contribute to gear ratio issues and should be addressed promptly.
3. Test the transmission speed sensors: The transmission speed sensors provide crucial information to the vehicle’s computer system for proper gear shifting. Using a digital volt ohm meter, test the resistance of the speed sensors to ensure they are functioning correctly.
4. Check for optimal oil pressure: Insufficient oil pressure can lead to gear ratio problems. Check the oil pressure using specialized tools to ensure it is within the manufacturer’s recommended range.
5. Test the transmission control module: The transmission control module (TCM) is responsible for controlling the gear shifting process. Use an OBD code scanner to retrieve any error codes related to the TCM and perform further diagnostic tests if necessary.

By following these diagnostic steps and using the appropriate tools, you can pinpoint the root cause of the P0733 error code and proceed with the necessary repairs.

How to Fix P0733

Fixing the P0733 error code requires a thorough diagnosis to determine the specific cause. Once the cause is identified, appropriate repairs can be made to resolve the issue. Here are some common solutions to fix P0733:

1. Replace faulty shift solenoids: Faulty shift solenoids can disrupt the gear shifting process and cause the P0733 error code. Replacing these solenoids can often resolve the issue.
2. Replace the transmission control module (TCM) or powertrain control module (PCM): A malfunctioning TCM or PCM can lead to incorrect gear ratios and trigger the P0733 error code. Replacing these modules may be necessary to fix the problem.
3. Check and replace transmission fluid and filter: Inadequate or contaminated transmission fluid can affect gear shifting and cause gear ratio problems. Adding or replacing the transmission fluid, along with the filter, can help address the issue.
4. Overhaul or replace the transmission: In severe cases, where other solutions fail to resolve the P0733 error code, overhauling or installing a new transmission may be necessary to fix the gear ratio problem.

It’s important to note that the appropriate repair method will depend on the specific cause of the P0733 error code. Consulting with a qualified mechanic or an auto repair shop is recommended to accurately diagnose the issue and determine the best course of action.

Remember, fixing the underlying cause of the P0733 error code is crucial for restoring proper transmission function and ensuring optimal vehicle performance.

Where to Get Professional Assistance for P0733

If you’re facing the P0733 error code in your vehicle’s automatic transmission and need expert help, it’s best to consult a qualified mechanic or take your vehicle to a reputable auto repair shop. Professional assistance is crucial in accurately diagnosing the issue and providing the appropriate repairs.

Qualified mechanics and reputable repair shops have the necessary expertise and diagnostic tools to identify the specific cause of the P0733 error code. They can perform in-depth inspections, conduct thorough tests, and provide professional guidance to resolve transmission gear errors and gear ratio problems.

By seeking professional assistance, you can rely on experienced professionals who have dealt with similar gear shifting issues and transmission errors. They understand the complexities of gearbox malfunctions and have the knowledge to troubleshoot gear misalignment, gear slippage, and other transmission-related problems.

When selecting a repair shop, it’s recommended to choose one with a good reputation and positive customer reviews. Ask for recommendations from friends, family, or colleagues who have had successful experiences with gearbox repair. Additionally, look for certifications such as the National Institute for Automotive Service Excellence (ASE) to ensure that the mechanics are highly skilled and trained in transmission repair and diagnosis.

Remember, attempting to fix transmission issues without the necessary expertise can lead to further complications and potential damage to your vehicle. It’s always recommended to seek professional assistance to ensure the proper diagnosis and repair of the P0733 error code.

Conclusion

In conclusion, the P0733 error code, indicating a problem with the third gear in the automatic transmission, can cause a range of symptoms and impact the drivability of the vehicle. It is crucial to accurately diagnose the specific cause of the error code to determine the appropriate repairs.

If professional assistance is unavailable, there are alternative solutions to consider. One option is to upload the Engine Control Unit (ECU) file to a portal for the permanent removal of the error code. However, it is important to note that this solution may not address the underlying issue causing the incorrect gear ratio.

To ensure the optimal performance and longevity of the transmission, it is recommended to consult a qualified mechanic or take the vehicle to a reputable auto repair shop. These experts possess the necessary expertise and diagnostic tools to accurately diagnose the problem and provide the appropriate repairs or replacements, such as replacing faulty shift solenoids, the transmission control module, or even overhauling the current transmission if necessary.

By addressing the gear ratio problem promptly and seeking professional assistance when needed, drivers can mitigate further damage, prevent potential accidents, and enjoy a smoother and safer driving experience.