If you own a Mazda and have encountered a P0734 Code, you know that this often indicates a transmission issue. In order to better understand the cause and potential solutions, it is important to have an understanding of what this code means and what can be done about it. This code, also known as “Transmission 4th Gear Ratio Incorrect”, is triggered when the ratio of the Turbine speed to the Vehicle speed is less than a preset value stored in memory. The possible causes of this code can range from low ATF level or a faulty oil pump, to a mechanical fault like a stuck shift valve or slipping clutch. It is important to identify the cause of the code in order to determine the best solution. In this article, we will discuss the causes and solutions for a Mazda P0734 Code.
Causes and Solutions for a Mazda P0734 Code
| Cause | Solution |
|---|---|
| ATF level is too low, or the ATF is badly deteriorated | Check ATF level and replace if necessary |
| A/T line pressure is low, or the oil pump has failed | Replace the A/T line pressure or oil pump |
| SSA, SSB, SSC or the PCS is stuck (mechanical fault) | Replace or repair the SSA, SSB, SSC or PCS |
| A/T 2-4 brake bank or 3-4 clutch is slipping (mechanical fault) | Replace or repair the A/T 2-4 brake bank or 3-4 clutch |
ATF Level is Too Low
If the automatic transmission fluid (ATF) level is too low or the fluid has become badly deteriorated, it can lead to a Mazda P0734 Code. The first step in troubleshooting this issue is to check the ATF level and, if necessary, replace the fluid. The new ATF should be compatible with the vehicle’s specifications and should be free of contaminants.
A/T Line Pressure is Low
If the automatic transmission line pressure is low, or the oil pump has failed, it can lead to a Mazda P0734 Code. In this case, the pressure needs to be checked and, if necessary, the oil pump needs to be replaced. It is important to make sure that the pressure is within the manufacturer’s specified range.
Stuck SSA, SSB, SSC or PCS
If the shift solenoid assembly (SSA), shift solenoid B (SSB), shift solenoid C (SSC), or the pressure control solenoid (PCS) is stuck, it can lead to a Mazda P0734 Code. In this case, the best solution is to replace or repair the affected component. In some cases, the component may only need to be cleaned and lubricated.
A/T 2-4 Brake Bank or 3-4 Clutch Slipping
If the automatic transmission 2-4 brake bank, or the 3-4 clutch is slipping, it can lead to a Mazda P0734 Code. In this case, the best solution is to replace or repair the affected component. It is important to make sure that all component are in good condition and are functioning properly.
Conclusion: Fixing the Mazda P0734 Code
The Mazda P0734 Code indicates a transmission issue, but it can be caused by several different issues. It is important to identify the cause of the code in order to determine the best solution. In this article, we discussed the most common causes and solutions for a Mazda P0734 Code. If you are experiencing this code, it is important to inspect the ATF level, A/T line pressure, shift solenoid assembly, and the 2-4 brake bank or 3-4 clutch in order to identify the cause of the problem. Once the cause is identified, you can then proceed with the appropriate solution to fix the Mazda P0734 Code.
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