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Engine-Codes – Audi – P0733 Audi

P0733 Audi Code - Gear 3 Incorrect Ratio

Quick Answer

The P0733 code for Audi vehicles indicates a problem with the transmission's gear 3, specifically an incorrect ratio. Common causes include Low transmission fluid levels or dirty/contaminated fluid, Faulty transmission solenoid or pressure control solenoid, Worn-out clutch components or bands. 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 Audi indicates Gear 3 Incorrect Ratio.
Common causes
Common causes include Low transmission fluid levels or dirty/contaminated fluid, Faulty transmission solenoid or pressure control solenoid, Worn-out clutch components or bands.
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 12, 2024
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Code P0733 Audi Description

The P0733 code for Audi vehicles indicates a problem with the transmission's gear 3, specifically an incorrect ratio. This means that the transmission is not shifting properly into the third gear, leading to issues with acceleration, fuel efficiency, and overall performance of the vehicle. When the transmission is not able to shift into the correct gear ratio, it can lead to increased wear and tear on the transmission components, potentially causing long-term damage if not addressed promptly.

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

Common Causes of P0733 Audi

  1. Low transmission fluid levels or dirty/contaminated fluid
  2. Faulty transmission solenoid or pressure control solenoid
  3. Worn-out clutch components or bands
  4. Malfunctioning sensors such as the speed sensor or throttle position sensor
  5. Internal mechanical issues within the transmission, such as worn gears or bearings

Symptoms of P0733 Audi

  1. Harsh or delayed shifting between gears
  2. Slipping transmission, especially in gear 3
  3. Decreased acceleration and power
  4. Decreased fuel efficiency
  5. Overheating transmission due to increased friction from incorrect gear ratio

How to Fix P0733 Audi

  1. Check and top up transmission fluid levels, or perform a fluid flush and filter replacement if necessary.
  2. Inspect and replace faulty solenoids or sensors that may be causing the incorrect gear ratio.
  3. Perform a transmission diagnostic scan to check for any error codes and reset the TCM.
  4. Conduct a thorough inspection of the transmission components, including the clutch system and gears, to identify any mechanical issues and repair as needed.
  5. Test drive the vehicle after repairs to ensure that the gear 3 ratio is now functioning correctly.

Cost to Fix P0733 Audi

The cost of repairing a P0733 code in an Audi can vary depending on the specific cause of the issue. On average, repairs for this type of transmission problem can range from $500 to $1500, including parts and labor. It's important to note that the cost can be higher if major transmission components need to be replaced or if the issue is more complex to diagnose and repair. Additionally, labor rates at auto repair shops can vary, so it's recommended to get quotes from multiple shops in your area to get a more accurate estimate.

What does this mean?

Tech Notes for P0733 Audi

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.

Frequently Asked Questions about P0733 Audi Code

1. What does the OBDII code P0733 mean on an Audi?

P0733 indicates "Gear 3 Incorrect Ratio," meaning the transmission's third gear is not achieving the expected gear ratio due to a mechanical, electrical, or hydraulic issue.

2. What are the common symptoms of the P0733 code in an Audi?

Symptoms may include difficulty shifting into or out of third gear, slipping in third gear, reduced fuel efficiency, harsh shifting, and the Check Engine Light being illuminated.

3. What causes the P0733 code to appear in an Audi?

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

4. Can driving with the P0733 code damage my Audi?

Yes, driving with this code can cause further damage to the transmission if the issue isn’t resolved promptly, especially if the problem involves slipping or overheating.

5. How do I diagnose the P0733 code on an Audi?

Start by checking the transmission fluid level and condition, then inspect wiring and connectors to the TCM, and test the shift solenoids and other related components with a diagnostic tool.

6. How can low transmission fluid cause a P0733 code?

Low transmission fluid can prevent proper hydraulic pressure needed to engage and maintain third gear, leading to an incorrect gear ratio.

7. How much does it cost to fix the P0733 code on an Audi?

Repair costs vary depending on the root cause, with minor fixes like fluid replacement costing around $100–$200, while major repairs like rebuilding the transmission can exceed $2,000.

8. Can a faulty TCM trigger the P0733 code?

Yes, a malfunctioning TCM can fail to properly control gear shifts, leading to an incorrect ratio being detected in third gear.

9. Will resetting the Check Engine Light fix the P0733 code?

No, resetting the light without addressing the underlying issue will not resolve the problem, and the code is likely to return.

10. What should I do if my Audi shows the P0733 code?

Have the vehicle inspected by a qualified mechanic promptly to diagnose and repair the issue, focusing on the transmission system and related components.

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