P075A Shift Solenoid G Malfunction

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P075A Shift Solenoid G Malfunction

OBD-II Trouble Code Technical Description

Shift Solenoid G Malfunction

What does that mean?

This is a generic transmission diagnostic trouble code (DTC) and typically applies to OBD-II vehicles equipped with an automatic transmission.

That may include but is not limited to vehicles from Chrysler, Ford, Dodge, Hyundai, Kia, Ram, Lexus, Toyota, Mazda, Honda, VW, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.

Most automatic transmissions incorporate a number of shift solenoids, depending on the number of gears inside. The trouble codes related to this, the "G" solenoid, are codes P075A, P075B, P075C, P075D, and P075E based on the specific malfunction that alerts the PCM to set the code and illuminate the Check Engine Light. If you have an Overdrive or other transmission warning lamp, it may be illuminated also.

The purpose of the Shift Solenoid Circuit is for the PCM to monitor the shift solenoids to manage the movement of fluid between various hydraulic circuits and change the transmission gear ratio at the appropriate time. This process maximizes the performance level of the engine at the lowest RPM possible.

The automatic transmission relies on bands and clutches to change gears and this is accomplished by having fluid pressure in the right place at the right time. The transmission solenoids are responsible for opening or closing valves in the valve body to allow transmission fluid to flow to the clutches and bands to shift the transmission smoothly as the engine accelerates.

When the Powertrain Control Module (PCM) detects a malfunction within the Shift Solenoid "G" Shift Circuit a variety of codes can be triggered depending on the specific vehicle, transmission and the number of gears incorporated into the specific automatic transmission. In this case, the P075A OBD-II trouble code is associated with a general malfunction with the the transmission Shift Solenoid "G" Circuit.

Example of shift solenoids:

What is the severity of this DTC?

The severity of this code normally starts as moderate, but it can progress to a more severe level rapidly when not corrected in a timely manner.

What are some of the symptoms of the code?

Symptoms of a P075A trouble code may include:

  • Transmission slipping
  • Transmission overheating
  • Transmission catches in gear
  • Decreased fuel economy
  • Possibly misfire-like symptoms
  • Vehicle enters limp mode
  • Check Engine Light illuminated
  • What are some of the common causes of the code?

    Causes for this P075A transmission code may include:

  • Insufficient fluid level
  • Dirty or contaminated fluid
  • Dirty or clogged transmission filter
  • Defective transmission valve body
  • Restricted hydraulic passages
  • Transmission has internal failure
  • Faulty shift solenoid
  • Corroded or damaged connector
  • Faulty or damaged wiring
  • Faulty PCM
  • What are some P075A troubleshooting steps?

    Prior to beginning the troubleshooting process for any malfunction you should research the Technical Service Bulletins (TSB’s) for the specific vehicle by year, model and transmission. In some circumstances this can save a lot of time in the long run by pointing you in the right direction. You should also check the vehicle records to verify the last time that the filter and fluid was changed if possible.

    Fluid & Wiring Inspections

    The first step is to make sure the fluid level is correct and inspect the condition of the fluid for contamination. Then, a thorough visual inspection to check the associated wiring for obvious defects such as scraping, rubbing, bare wires, or burn spots should be performed.

    Next is to check the connectors and connections for security, corrosion and damaged pins. This process must include all wiring and connectors to the transmission solenoids, transmission pump and the PCM. Based on the configuration, the transmission linkage should be inspected for security and binding issues.

    Advanced Steps

    The advanced steps become very vehicle specific and require the appropriate advanced equipment to perform accurately. These procedures require a digital multi meter and the specific technical references for the vehicle. Voltage requirements will very based of the specific year and model of the vehicle. You should follow the specific troubleshooting chart for your vehicle.

    Continuity Checks

    Continuity checks should always be performed with the power removed from the circuit and the normal readings for wiring and connections should be 0 ohms of resistance unless otherwise specified by the technical data. Resistance or no continuity is an indication of faulty wiring that is open or shorted and must be repaired or replaced.

    What are some common repairs for this code?

  • Changing the fluid and filter
  • Repair or replace a faulty shift solenoid
  • Repair or replace defective transmission valve body
  • Repair or replace defective transmission
  • Transmission flush to clean passages
  • Cleaning corrosion from connectors
  • Repairing or replacing wiring
  • Flashing or replacing PCM
  • Hopefully, the information in this article has been helpful to point you in the right direction to correct the problem with your Shift Solenoid Circuit fault code. This article is strictly informational and the specific technical data and service bulletins for your vehicle should always take priority.

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    "Delete Error Code Permanently, Disable DTC Error Code Function for p075a in the ECU"

    In extreme cases, we even have the option to permanently remove the specific DTC p075a and disable the function of the specific error code in the ECU. All other fault code functions will then continue to work to protect the engine. This is different from clearing an error code with a diagnostic device. We have the option to permanently remove the function of the specific error code, so that it never comes back. Also emergency running that occurs on the specific error code can be solved in most cases.

    Of course we prefer to first try to solve the cause of the error code, but sometimes the only solution is to permanently disable the DTC function of p075a.

    Make an appointment for permanent removal of p075a