P2734 - OBD Trouble Code

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Your mechanic may have informed you that the reason your vehicle was acting up was because of the P2734 code. This OBD error is defined as a Pressure Control Solenoid "F" Electrical. Your vehicles have a Transmission Control Module (TCM) which makes use of the Pressure Control Solenoids so that it can control the hydraulic pressure in the transmission. It does this to be able to apply the different clutch packs which will help it change gears as needed by the driver. The whole choreography of the TCM helps propel your vehicle smoothly and safely on the road. If the TCM picks up an issue with the pressure control solenoid it will set the P2734 code and the check engine light will be illuminated.

The Pressure Control Solenoid Valve, also known as the PC solenoid valve, is a significant part of the TCM. It has an electronic pressure regulator which controls the transmission line pressure as the current flows through its coil windings. When the current flow is increased there’s a magnetic field which is produced by the coil. This pressure moves the solenoid’s plunger away from the exhaust port. When the exhaust port is open it decreases the output fluid pressure which is regulated by the PCM solenoid valve as well. This in turn decreases the line pressure. The oil pump discharge is regulated by the line pressure solenoid valve, to suit the driving condition in reaction to the signal sent from the TCM.

What causes this problem with the Pressure Control Solenoid "F" Electrical?

• Issue with the Pressure Control Solenoid
• Transmission fluid is dirty
• Filter of the transmission is clogged or dirty
• Transmission pump is not working properly
• Transmission valve body is damaged
• The hydraulic passages are clogged
• The connectors are damaged or corroded, as are the wires and circuitry
• Problematic PCM

1. Electronic Pressure Regulator - These push valve and a vent valve in order to maintain the outlet pressure at the desired set-point. There’s a small internal pressure sensor which monitors the output pressure while a digital/analog controller will adjust the timing of the servo valves so that it can maintain the set-point. Try to repair the issue you are facing, or replace the regulator from PartsAvatar. We ship to the remotest corners in Canada, and also offer pick-up options at our warehouses located in Brampton and Edmonton.
2. Transmission Control Module - Is the module that controls the functionality of the transmission in your vehicle. It is able to shift gears as needed by collecting data and processing signals to be calculated how to shift the gears. The transmission will generate signals that will drive actuators to accomplish shifting. Fix the issue with your TCM which has caused the P2734 code to set. Simply order online and have it delivered right to your doorstep in a matter of days!
3. Powertrain Control Module - Is the central processing unit of your vehicle. Its prime task is to monitor how the rest of the modules are functioning and if the vehicle is having any issues. If the PCM module itself is having issues, then random codes can be set, to avoid this problem you will have to repair or replace the PCM as needed. Find vehicle compatible PCM modules online on PartsAvatar today.
4. Transmission Filter - A dirty transmission filter can cause multiple issues including the P2734 code, you can check and clean it so that it doesn’t obstruct the flow of fluid. If repairs won’t help resolve the problem, opt for replacement. Find Transmission filters by a wide range of brands on our website, and avail free shipping on orders over $99.
5. Transmission Pump - A faulty transmission pump can very well cause the P2734 code to set, you will have to try to fix it via repairs first and see if the code goes away. If that’s not resolving the issue, simply opt for a replacement of transmission pump.
6. Transmission Valve Body - This is the control center of the TCM. It possesses a number of channels and passages which direct hydraulic fluid to all the other valves which help in activating the clutch packs as needed to shift gears. It helps in the vehicle to propel smoothly on road. A fault of the transmission valve body can be a reason to the P2734 code. Try to repair it first and see if the P2734 code goes away, if it doesn’t you will have to find a replacement. PartsAvatar offers a wide price range on quality replacement parts. You can order from the comfort of your home and track your order till it reaches you. 

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2734 here:

Common Symptoms

• The PCM makes the vehicle enter limp mode for safety
• The Transmission frequently slips when shifting
• Transmission is overheating more frequently
• The Transmission catches in gear
• Reduction in the fuel economy
• Presence of symptoms associated with misfire
• Check Engine Light is turned on

We have listed out some ways which would help you to correct the occurrence of OBD Code P2734. They are mentioned here as follows:

• Change the fluid and filter
• Repair the faulty Pressure Control Solenoid or replace it if needed
• Repair or replace the faulty transmission pump
• Fix the defective transmission valve body through repairs or replace it
• Flush the Transmission to clean passages
• Clean all the corrosion from connectors and repair or replace the damaged wiring
• Flash the PCM or replace it

However, if you face any issue then we have stocked a wide range of best priced pressure control solenoid valve, electronic pressure regulator, transmission control module, transmission filter, transmission pump, transmission valve body and more to help you out in fixing your car.

Here are some steps which you should follow in order to diagnose this fault code:

The first step to a thorough diagnosis is to research the Technical Service Bulletins (TSB’s). For this you will have to match your vehicle’s year of manufacture, model and transmission. The reason why the TSB should be referred is mainly to save you time, and effort. It serves as a great tool during diagnosis.

Now you’re ready to perform a fluid check. Measure the level of fluid and also observe the condition of the fluid for any dirt or contamination. Don’t be hasty in changing the fluid, check the vehicle records to see when the fluid and filter change was done last. Depending on what you have found, you can proceed to changing the fluid or simply skip this step if the fluid level and purity is good.

Once the fluid is sorted, it’s time to do an inspection of the wiring. Perform a detailed visual examination and see if there are any damages present. Continue inspection of the connectors and see if the pins are corroded, bent or damaged. Check the wires and connectors going to the transmission pressure solenoids, transmission pump as well as the PCM. Depending on the type of vehicle the transmission pump may be driven electrically or mechanically. Fix all the issues you have found by conducting repairs or replacements as required.

Go ahead and perform a continuity checks, these will be done to figure out the problem if it wasn’t with the fuel, filter or electrical components. Continuity check is an advanced step, and hence will need certain tools like a digital multimeter and the specific technical references for the vehicle. Get hold of them and also all the troubleshooting information for your particular vehicle from the TSBs.

After the continuity is checked, you can move on to do a check on voltage. To confirm the voltage and fluid pressure requirements you will need to refer the TSBs. In terms of continuity checks, they will usually be 0 ohms of resistance, but for safety refer your vehicles information source. When performing the continuity checks you have to ensure that power is removed from the circuit. This is important to avoid shorting the circuit and causing more damage to the vehicle. If you find that there is no continuity or resistance then that’s an indication that there is faulty wiring present which may be open or shorted and needs to be repaired/replaced.

Common Mistakes When Diagnosing the P2734 Code

• Failure of the Transmission Control Module (TCM)
• Low level of Transmission fluid
• The Transmission shift solenoid is no longer working
• Problems with wiring