Technical Description of OBD-II Trouble Code
The Pressure Control Solenoid F is experiencing intermittent issues.
What does that mean?
This is a generic diagnostic trouble code (DTC) for transmission and is commonly found in OBD-II vehicles with automatic transmissions.
This can apply to various vehicle brands such as Mitsubishi, Mercedes Benz, Nissan, BMW, Infiniti, Ford, Audi, VW, Audi, Honda, etc. Although it is a generic code, the specific repair steps may vary depending on the year, make, model, and powertrain configuration.
When the P2735 OBD-II trouble code is triggered, it means that the Powertrain Control Module (PCM) has detected a problem with the Transmission Pressure Control Solenoid “F”. Most automatic transmissions have three solenoids (A, B, and C), but in this case, the transmission has six solenoids (A, B, C, D, E, and F). The trouble codes related to the “F” solenoid are P2731, P2732, P2733, P2734, and P2735. The specific malfunction that triggers the code determines which code is set and causes the Check Engine Light to illuminate.
The purpose of the Transmission Pressure Control Solenoids is to regulate the fluid pressure for the proper operation of an automatic transmission. The PCM receives an electronic signal based on the pressure within the solenoids. An automatic transmission relies on bands and clutches that change gears by having fluid pressure in the right place at the right time. Based on signals from devices that monitor the vehicle’s speed, the PCM controls the pressure solenoids to direct fluid at the appropriate pressure to different hydraulic circuits, which change the transmission gear ratio at the correct time.
The P2735 code is triggered when the Pressure Control Solenoid “F” operates intermittently.
Example of a transmission pressure control solenoid:
What is the severity of this DTC?
Initially, the severity of this code is moderate, but if not addressed promptly, it can escalate to a more severe level.
What are some of the symptoms of the code?
Symptoms of a P2735 trouble code may include:
What are some of the common causes of the code?
Possible causes for this P2735 transmission code may include:
What are some P2735 troubleshooting steps?
Prior to starting the troubleshooting process for any malfunction, it is recommended to research the Technical Service Bulletins (TSB’s) specific to the vehicle’s year, model, and transmission. This can save time by providing guidance in the right direction. It is also advisable to check the vehicle records to determine when the filter and fluid were last changed, if possible.
Fluid & Wiring Inspections
The first step is to check the fluid level and examine the condition of the fluid for contamination. Before changing the fluid, it is important to check the vehicle records to verify the last time the filter and fluid were changed.
Next, perform a detailed visual inspection to check the condition of the wiring for any obvious defects. Inspect the connectors and connections for security, corrosion, and damaged pins. This should include all wiring and connectors related to the transmission pressure control solenoids, transmission pump, and PCM. Depending on the configuration, the transmission pump may be electrically or mechanically driven.
Advanced Steps
The advanced steps are highly vehicle-specific and require specialized equipment for accurate performance. These procedures involve using a digital multimeter and referring to the specific technical references for the vehicle. It is important to obtain the specific troubleshooting guidelines for the vehicle before proceeding with the advanced steps. Voltage requirements and fluid pressure requirements may vary based on the specific model and transmission design.
Continuity Checks
Unless otherwise specified by the technical data, the normal readings for wiring and connections should be 0 ohms of resistance. Continuity checks should always be performed with the power removed from the circuit to avoid shorting the circuit and causing further damage. Resistance or lack of continuity indicates faulty wiring that is either open or shorted and must be repaired or replaced.
What are some common repairs for this code?
Possible misdiagnosis may include:
We always recommend seeking professional service to address this issue. However, if that is not possible, we offer the option to permanently delete this specific DTC while keeping all other codes active. If you are interested in this option, please upload your ECU file to our portal.
