The P0735 code is a diagnostic trouble code (DTC) indicating an issue with the transmission of your vehicle, specifically related to the fifth gear. This code signifies that the transmission control module (TCM) has detected that the vehicle is not shifting into the fifth gear correctly, which can lead to various performance issues.
What Does the P0735 Code Mean?
OBD-II Code P0735 is defined as a Gear 5 Incorrect Ratio. This means that the TCM has recognized a discrepancy in the gear ratio for the fifth gear, suggesting that the transmission is not functioning as intended.
What Causes the P0735 Code?
Several factors can trigger the P0735 code, including:
- Internal transmission failure
- Transmission Control Module (TCM) failure
- Powertrain Control Module (PCM) failure
- Transmission valve body failure
- Wiring issues or damaged connectors
What Are the Symptoms of the P0735 Code?
When the P0735 code is present, you may experience the following symptoms:
- Increased fuel consumption
- Transmission may not shift properly
How Serious Is the P0735 Code?
The P0735 code is classified as an urgent issue. It indicates significant malfunctions that can potentially cause severe damage to the vehicle, affect drivability, and pose risks to the driver and passengers. Immediate attention is advised.
How to Diagnose the P0735 Code
Diagnosing the P0735 code typically involves the following steps:
- Use an OBD-II scanner to confirm the presence of the P0735 code and check for any other related codes.
- Inspect the transmission fluid for proper level and condition, as low or dirty fluid can impact transmission performance.
- Examine wiring and connectors for damage or corrosion.
- Test the TCM and PCM for proper function.
- Consider performing a road test to observe transmission behavior under various conditions.
Common Repairs for the P0735 Code
Repairs needed to resolve the P0735 code may include:
- Changing the automatic transmission fluid and filter
- Repairing or replacing the TCM or PCM
- Fixing wiring issues or replacing damaged connectors
- Addressing internal transmission failures, which may require a rebuild or replacement
How Much Does It Cost to Fix the P0735 Code?
The cost to repair the P0735 code can vary significantly based on the underlying cause. Simple fixes like fluid changes may cost a few hundred dollars, while more complex repairs involving transmission components or control modules can range from $1,000 to $4,000 or more.
Can I Fix the P0735 Code Myself?
If you have mechanical experience and the right tools, you can attempt to address the P0735 code yourself, particularly if it involves changing the transmission fluid or inspecting wiring. However, for more complicated issues like internal transmission repairs or module replacements, it’s advisable to seek professional assistance to ensure proper diagnosis and repair.
