P0735 Audi Code - Gear 5 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 (5th) 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
- P0735 Audi indicates Gear 5 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 P0735 Audi 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 (5th) 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 P0735 Audi?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0735 Audi?
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 P0735 Audi 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 P0735 Audi Code
1. What are the common symptoms of OBDII code P0735 in an Audi indicating Gear 5 Incorrect Ratio?
- Common symptoms include harsh shifting into or out of gear, slipping in gear 5, decreased fuel efficiency, and the transmission may go into limp mode.
2. What are the possible causes of OBDII code P0735 in an Audi?
- Possible causes include a faulty transmission shift solenoid, low transmission fluid level or quality, worn clutch components, damaged wiring, or a malfunctioning transmission control module.
3. How can I diagnose the underlying issue causing OBDII code P0735 in my Audi?
- Diagnose the issue by performing a thorough inspection of the transmission fluid level and condition, checking for any visible wiring damage, and conducting a scan tool test to monitor transmission sensor data.
4. Can low transmission fluid cause OBDII code P0735 in an Audi?
- Yes, low transmission fluid can lead to gear ratio errors, including the incorrect ratio in gear 5, triggering OBDII code P0735 in an Audi.
5. Is it safe to continue driving my Audi with OBDII code P0735 indicating Gear 5 Incorrect Ratio?
- It is not recommended to continue driving with this code as it can lead to further transmission damage. It is best to address the underlying issue promptly.
6. How can I repair OBDII code P0735 in my Audi at home?
- You may attempt to repair this code at home by checking and refilling the transmission fluid to the proper level, inspecting and replacing any damaged wiring, or resetting the transmission control module.
7. Will resetting the transmission control module clear OBDII code P0735 in my Audi?
- Resetting the transmission control module may temporarily clear the code, but if the underlying issue causing the incorrect gear ratio in gear 5 is not resolved, the code is likely to return.
8. Can a transmission flush help resolve OBDII code P0735 in my Audi?
- A transmission flush may help if the issue is related to dirty or degraded transmission fluid. However, if the problem lies with mechanical components, a flush may not resolve OBDII code P0735.
9. How much does it typically cost to repair OBDII code P0735 in an Audi at a professional auto repair shop?
- The cost of repairing OBDII code P0735 can vary depending on the exact cause. Repairs may range from a few hundred to over a thousand dollars, so it is recommended to obtain quotes from reputable repair shops.
10. Can a faulty transmission control module cause OBDII code P0735 in an Audi?
- Yes, a malfunctioning transmission control module can lead to incorrect gear ratios, including gear 5, triggering OBDII code P0735 in an Audi.
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