P0733 BMW Code - Gear 3 Incorrect ratio
Quick Answer
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows: Torque converter slip ratio = A x C/B A: Output shaft revolution signal from revolution sensor B: Engine speed signal from Engine Control Module (ECM) C: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (3rd) supposed by TCM, the slip ratio will be more than normal. Common causes include Low transmission fluid level, Dirty transmission fluid, Shift solenoids. 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 BMW indicates Gear 3 Incorrect ratio.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Shift solenoids.
- 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.
Code P0733 BMW Description
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (3rd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
What are the Possible Causes of the DTC P0733 BMW?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0733 BMW?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0733 BMW code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0733 BMW Code
1. What are common symptoms of OBDII code P0733 in a BMW indicating Gear 3 Incorrect ratio?
- Common symptoms include harsh shifting, delayed engagement, slipping gears, and illuminated Check Engine Light.
2. What are the possible causes of OBDII code P0733 in a BMW?
- Potential causes include low transmission fluid level, faulty transmission solenoids, worn clutch components, or a malfunctioning transmission control module.
3. How can I diagnose OBDII code P0733 in a BMW at home?
- You can start by checking the transmission fluid level and condition, conducting a visual inspection of the transmission components, and scanning for additional trouble codes with an OBDII scanner.
4. What are some repair tips for resolving OBDII code P0733 in a BMW?
- Repair tips may include performing a transmission fluid flush and filter replacement, checking and replacing faulty solenoids or sensors, inspecting and repairing damaged wiring, or recalibrating the transmission control module.
5. Can driving with OBDII code P0733 in a BMW cause further damage to the vehicle?
- Continuing to drive with this code may lead to increased transmission wear, reduced fuel efficiency, and potential long-term damage to the transmission components.
6. How much does it typically cost to repair OBDII code P0733 in a BMW at a professional auto repair shop?
- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
7. Is it safe to continue driving my BMW with OBDII code P0733 before getting it repaired?
- It is not recommended to drive the vehicle extensively with this code present, as it can lead to further transmission damage and potentially unsafe driving conditions.
8. Can OBDII code P0733 in a BMW be triggered by a simple issue like a loose electrical connection?
- Yes, a loose electrical connection or faulty sensor can sometimes trigger this code, so it's important to conduct a thorough inspection before assuming a major transmission problem.
9. How long does it typically take to repair OBDII code P0733 in a BMW?
- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day for the repair to be completed.
10. Is it possible to reset OBDII code P0733 in a BMW using an OBDII scanner?
- While you can clear the code temporarily with an OBDII scanner, it is crucial to diagnose and address the underlying issue causing the code to prevent it from recurring.
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