P2735 - Intermittent pressure control solenoid F

Introduction

DTC P2735 is a common problem that auto mechanics may encounter when diagnosing automatic transmissions. This code indicates a malfunction of the pressure control solenoid F, which can significantly affect the operation of the transmission. In this article, we will explore the symptoms, causes, diagnosis, resolution, and repair of this error code, providing useful information for auto mechanics who want to address this problem effectively.

Symptoms

Symptoms associated with DTC code P2735 can vary, but generally include:

  • Irregular gear changes :
    The transmission may have difficulty shifting gears, resulting in a rough ride.

  • Slowdowns or slippages :
    You may experience a delay during acceleration, or the transmission may slip in certain situations.

  • Check engine light comes on :
    The DTC code P2735 is often accompanied by the check engine light on the dashboard.

  • Reduced fuel efficiency :
    Due to transmission problems, increased fuel consumption may occur.

Cause

The causes of the P2735 error code can be many and include:

  • Pressure control solenoid malfunction F :
    The component may be faulty or not working properly.

  • Electrical problems :
    Damaged wires or loose connections can cause the solenoid to malfunction.

  • Low oil pressure in transmission :
    If the oil pressure is insufficient, the solenoid cannot operate properly.

  • Engine control unit (ECU) problems :
    A malfunction of the ECU can lead to incorrect readings and activation of the DTC code.

  • Transmission oil contamination :
    Contaminated oil can adversely affect the operation of transmission components.

Diagnosis

Diagnosing DTC code P2735 requires a systematic approach:

  1. DTC Code Scan :
    Start by scanning the ECU to identify any DTC codes present. This may also include related codes such as P0700 (Transmission Malfunction).

  2. Visual inspection :
    Visually inspect the F pressure control solenoid wiring and connections. Look for signs of wear, corrosion, or damage.

  3. Checking the oil pressure :
    Use a pressure gauge to check the transmission oil pressure. Make sure it is within the manufacturer's specifications.

  4. Solenoid Test :
    Perform solenoid activation tests to see if it responds properly to ECU signals.

  5. Checking the transmission oil :
    Check the level and condition of the transmission oil. Dirty or low oil should be replaced.

Resolution and repair

Once the cause of the DTC code P2735 has been identified, the following actions can be taken to resolve the issue:

  1. Replacing the pressure control solenoid F :
    If the solenoid is faulty, replace it with a new one. Make sure to use high quality components.

  2. Wiring Repair :
    If you find any damaged cables or loose connections, repair or replace them. Make sure to use proper materials to ensure a secure connection.

  3. Changing the transmission oil :
    If the oil is contaminated or low, perform a complete transmission oil change and replace the filter.

  4. ECU Check :
    If you suspect a problem with the ECU, perform thorough tests to confirm that it is working properly. In some cases, the ECU may need to be reprogrammed or replaced.

  5. Road test :
    After completing repairs, perform a road test to ensure that the DTC code is no longer triggered and that the transmission is operating properly.

Insight: Components involved in the failure

Control solenoids

Control solenoids are essential components of automatic transmissions. These electromechanical devices regulate the flow of oil within the transmission, directly influencing the pressure and operation of the gears. In the case of DTC code P2735, the pressure control solenoid F is responsible for managing the oil pressure in a certain circuit of the transmission. A malfunction in this component can lead to erratic gear shifts and a deterioration in the overall performance of the transmission.

ECU (Engine Control Unit)

The ECU, or engine control unit, is the brain of the vehicle. It receives information from sensors, processes the data, and sends commands to the various actuators, including the transmission control solenoids. A programming error or a fault in the ECU can cause transmission control systems to malfunction, triggering DTC codes such as P2735.

Conclusions

DTC P2735 is a serious problem that requires immediate attention from auto repairers. Understanding the symptoms, causes, and how to diagnose and repair it is essential to ensure effective intervention. Through accurate diagnosis and appropriate resolution, it is possible to restore the correct operation of the transmission and ensure safe and comfortable driving. Always using high-quality components and following the procedures recommended by the manufacturers is essential to avoid future problems and ensure customer satisfaction.

Important
Not all OBD2 codes used by one manufacturer are used by other brands, and may not have the same meaning.
The information presented here is for informational purposes only. We are not responsible for any actions you take on your vehicle. If you have any concerns about repairing your vehicle, please contact your repair shop.