The Engine Fault Code P0735 indicates a problem with the fifth gear ratio in the transmission. This code usually means that the transmission control module (TCM) has detected that the ratio of input speed to output speed in fifth gear does not match what it expects. This could be due to various issues, such as:
1. Transmission Fluid Issues: Low or dirty transmission fluid can affect shifting and cause incorrect ratios.
2. Faulty Transmission Sensors: Sensors that monitor speed and gear position might be malfunctioning.
3. Worn Gears or Clutch Packs: Internal wear in the transmission can lead to improper engagement of fifth gear.
4. Electrical Problems: Wiring issues or faulty connectors can disrupt communication between the TCM and the transmission.
5. Software Issues: Sometimes, a software update for the TCM may be needed.
The meaning of P0735 can vary slightly depending on the manufacturer. Here are some alternative meanings based on different brands:
– Porsche: Similar to the general definition; it often relates to issues in the Tiptronic transmission.
– Mini: May indicate a problem with the Getrag transmission used in some models.
– Mercedes-Benz: Could be associated with the 7G-Tronic transmission and may involve specific solenoid issues.
– Audi: Often relates to the multitronic or S-Tronic systems, indicating a problem with the CVT or dual-clutch transmission.
– Jaguar: May indicate issues with the ZF automatic transmission, often requiring a detailed diagnostic.
– Land Rover: Similar to Jaguar, as both brands share some transmission components; could indicate a failure in the automatic gearbox.
If you encounter this code, it`s best to have a professional diagnose the issue, as driving with a transmission fault can lead to more severe damage.
The Engine Fault Code P0735, which indicates `Gear 5 Incorrect Ratio,` means that the transmission control module (TCM) has detected a problem with the fifth gear ratio in the transmission. This can happen for several reasons, and while the general causes are similar across different manufacturers, there can be specific issues related to each brand. Here are some common causes:
Common Causes:
1. Transmission Fluid Issues:
– Low or dirty transmission fluid can affect shifting and gear ratios.
– Fluid leaks can lead to low levels.
2. Faulty Transmission Control Module (TCM):
– If the TCM is malfunctioning, it may not control the transmission properly.
3. Worn or Damaged Gears:
– Physical wear or damage to the fifth gear can cause incorrect ratios.
4. Faulty Speed Sensors:
– Speed sensors monitor the vehicle`s speed and help the TCM adjust shifting. If these sensors fail, it can lead to incorrect gear readings.
5. Electrical Issues:
– Wiring problems, such as damaged connectors or short circuits, can interfere with the TCM`s ability to read gear ratios.
6. Faulty Shift Solenoids:
– Shift solenoids control the flow of transmission fluid. If one fails, it can prevent the transmission from shifting into the correct gear.
Manufacturer-Specific Issues:
– Porsche:
– Porsche vehicles may have unique transmission designs. Issues could stem from the dual-clutch system or specific electronic components related to the PDK transmission.
– Mini:
– Mini vehicles, especially those with BMW-sourced transmissions, may experience issues with the mechatronic unit, which controls both the transmission and the engine.
– Mercedes:
– Mercedes-Benz vehicles often use complex transmission systems. Problems could arise from the conductor plate or valve body issues.
– Audi:
– In Audis, the issue might relate to the multitronic or S-tronic transmissions, where the belt or chain may wear out, affecting the gear ratio.
– Jaguar:
– Jaguar vehicles may have specific transmission control software issues or hardware problems in the ZF transmission that can lead to this code.
– Land Rover:
– Land Rover models might have unique issues with their Terrain Response systems affecting transmission behavior, especially in off-road conditions.
If you encounter the P0735 code, it`s important to check the transmission fluid first and look for leaks. If the fluid is fine, a deeper diagnostic may be necessary to check sensors, the TCM, and other components. Each brand may have specific quirks, so consulting a repair manual or a professional mechanic familiar with your vehicle is always a good idea.
The P0735 code indicates that the transmission control module has detected an incorrect ratio in gear 5. This can happen in various European cars, including Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover. Heres a general guide on how to fix this issue, along with manufacturer-specific considerations:
General Steps to Fix P0735 Code:
1. Check Transmission Fluid:
– Ensure the transmission fluid is at the correct level and in good condition. Low or dirty fluid can cause shifting issues.
2. Inspect for Leaks:
– Look for any signs of leaks around the transmission and fluid lines. Fix any leaks before proceeding.
3. Scan for Additional Codes:
– Use an OBD-II scanner to check for other trouble codes. Sometimes, multiple codes can help pinpoint the problem.
4. Examine the Wiring and Connectors:
– Inspect the wiring and connectors related to the transmission. Look for damaged wires, loose connections, or corrosion.
5. Check the Transmission Control Module (TCM):
– If everything else looks good, the TCM itself might be faulty. You may need to reprogram or replace it.
6. Inspect the Transmission:
– If the above steps dont resolve the issue, the problem might be internal. Check for worn gears, clutches, or bands in the transmission.
7. Perform a Transmission Flush:
– Sometimes, a transmission flush can help if the fluid is contaminated. Make sure to use the correct fluid specified for your vehicle.
Manufacturer-Specific Considerations:
– Porsche:
– Check for software updates for the transmission control unit. Porsche often releases updates that can resolve shifting issues.
– Mini:
– Mini vehicles may have specific adaptations that need to be reset after repairs. Use a diagnostic tool to perform this reset.
– Mercedes:
– Mercedes models may require a specific procedure for checking fluid levels, as some have sealed transmissions. Refer to the service manual for correct procedures.
– Audi:
– Audi cars often have complex transmission systems. If the issue persists, consider taking it to a specialist who understands the specific model.
– Jaguar:
– Jaguars might have unique transmission setups. Check for recalls or service bulletins related to the transmission.
– Land Rover:
– For Land Rover, ensure that the terrain response system is functioning correctly, as it can affect transmission behavior.
Final Note:
If youre not comfortable performing these checks or repairs yourself, its wise to seek help from a professional mechanic, especially for complex transmission issues.
Driving with a P0735 code, which indicates `Gear 5 Incorrect Ratio,` is generally not safe. This code usually means theres an issue with the transmission, specifically with the fifth gear. Heres what you should know:
1. Transmission Problems: The code suggests that the transmission is not shifting properly into fifth gear. This can lead to poor acceleration and may cause further damage to the transmission if you continue to drive.
2. Manufacturer Differences:
– Porsche: In Porsches, this code can lead to limp mode, where the car limits its speed to protect the transmission. It`s best to avoid driving until it`s fixed.
– Mini: Mini vehicles may experience a rough shift or delayed engagement. Driving could worsen the issue, so it`s advisable to get it checked.
– Mercedes: Mercedes cars may show this code due to low transmission fluid or a faulty sensor. Driving can lead to more serious damage, so it`s better to address the issue quickly.
– Audi: In Audis, this code might indicate a problem with the transmission control module. Continuing to drive can lead to more significant issues, so its best to repair it soon.
– Jaguar: Jaguars may experience erratic shifting and potential overheating of the transmission. Its safer to stop driving until the problem is resolved.
– Land Rover: Land Rovers can show this code due to various transmission issues. Driving can lead to further complications, so its wise to have it checked out.
3. General Advice: Regardless of the make, its recommended to avoid driving the vehicle with this code. Its best to have a qualified mechanic diagnose and fix the issue to prevent further damage.
