The P0735: Gear 5 Incorrect Ratio refers to a fault where the transmission control module (TCM) detects an improper gear ratio while the vehicle is in fifth gear. This problem can arise due to internal mechanical issues, faulty sensors, or malfunctioning solenoids that regulate gear shifts.
P0735 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0735: Gear 5 Incorrect Ratio |
| Is it serious? | Yes, this can cause drivability issues and may lead to long-term transmission damage. |
| Possible causes | – Incorrect gear ratio detected for gear 5 – Transmission mechanical issues – Faulty sensors or solenoids |
| How to diagnose? | – Inspect and test for mechanical issues in the transmission – Check gear ratio sensors and solenoids – Replace faulty components if necessary |
P0735 Meaning
The P0735 code indicates that the transmission is detecting an incorrect ratio while the vehicle is in fifth gear. This may result from mechanical problems inside the transmission, such as worn gears or broken bands, or faulty sensors and solenoids responsible for monitoring and controlling gear ratios.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional transmission-related codes that could provide more information. | OBD-II Scanner |
| Inspect Transmission Components | Inspect the transmission for mechanical issues such as worn gears, damaged bands, or other internal components affecting gear ratios. | Transmission Tools, Flashlight |
| Test Gear Ratio Sensors | Test the sensors responsible for monitoring gear ratios using a diagnostic tool to ensure they are functioning correctly. | Multimeter, Diagnostic Scanner |
| Check Solenoids | Inspect and test the solenoids responsible for controlling gear shifts to confirm they are working properly. Replace faulty solenoids if needed. | Multimeter, Solenoid Tester |
| Inspect Transmission Fluid | Ensure the transmission fluid is at the proper level and not contaminated. Poor-quality or low fluid can impact gear ratio performance. | Transmission Fluid Tester, Dipstick |
| Replace Faulty Components | Replace any defective sensors, solenoids, or transmission components that are contributing to the gear ratio issue. | Replacement Parts, Wrenches, Screwdrivers |
| Clear the Code and Test Drive | After repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to verify that the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, rescan the vehicle to ensure the P0735 code has not reappeared. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko