P0735 Mercedes-Benz 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 Mercedes-Benz 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 Mercedes-Benz 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 Mercedes-Benz?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0735 Mercedes-Benz?
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 Mercedes-Benz 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.
Need more information about the P0735 Mercedes-Benz code?
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Need Help with the Code?
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Frequently Asked Questions about P0735 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0735 in a Mercedes-Benz related to Gear 5 Incorrect Ratio?
- Common symptoms include harsh shifting, delayed engagement when shifting into gear, and the transmission staying in one gear.
2. What are the possible causes of OBDII code P0735 in a Mercedes-Benz?
- The code P0735 can be triggered by issues such as a faulty transmission shift solenoid, low transmission fluid levels, or a malfunctioning transmission control module.
3. How can I diagnose the cause of OBDII code P0735 in my Mercedes-Benz?
- To diagnose the issue, it is recommended to perform a thorough inspection of the transmission components, check the transmission fluid level and condition, and use a scan tool to gather data from the vehicle's onboard computer.
4. Can driving with OBDII code P0735 in a Mercedes-Benz cause further damage?
- Continuing to drive with the code P0735 present may lead to further damage to the transmission components and should be addressed promptly to avoid costly repairs.
5. What are some repair tips for addressing OBDII code P0735 in a Mercedes-Benz?
- Repair tips may include checking and topping up transmission fluid levels, inspecting and potentially replacing the transmission shift solenoid, and resetting the transmission control module.
6. Is it possible to reset the OBDII code P0735 in a Mercedes-Benz without fixing the underlying issue?
- While clearing the code temporarily may be possible, it is crucial to address the root cause of the problem to prevent the code from reoccurring and to ensure the proper functioning of the transmission.
7. How much does it typically cost to repair OBDII code P0735 in a Mercedes-Benz?
- The cost of repairing the code P0735 can vary depending on the specific cause of the issue, but it is advisable to budget for diagnostic fees, parts replacement costs, and labor charges.
8. Can a DIY enthusiast fix OBDII code P0735 in a Mercedes-Benz, or is professional assistance recommended?
- While some basic inspections and maintenance tasks can be performed by DIY enthusiasts, diagnosing and repairing complex transmission issues like OBDII code P0735 may be best left to experienced professionals.
9. Are there any preventive measures to avoid encountering OBDII code P0735 in a Mercedes-Benz?
- Regularly checking and maintaining proper transmission fluid levels, promptly addressing any transmission issues, and following the manufacturer's recommended service intervals can help prevent OBDII code P0735 from occurring.
10. How long can I safely drive my Mercedes-Benz with OBDII code P0735 before getting it repaired?
- It is recommended to address the issue promptly to prevent further damage to the transmission. Continuing to drive with OBDII code P0735 present may lead to more significant and costly repairs in the future.
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