Error Code P2721: What It Means & What To Do?

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What does P2721 error refer to? If you are looking for this information, then keep reading further. Improper transmission shift is called pressure control solenoid "D" control circuit low. The hydraulic pressure of a vehicle has to be controlled where this function is performed by the TCM by using the pressure control solenoids. This is mainly needed to supply clutch packs in the transmission so that the vehicle will move forward efficiently when several gear ratios are applied. If the solenoid fails to work properly, which is detected by the TCM, then the P2721 error is set.

The pressure control solenoid valve is an electronic pressure regulator which looks after the transmission line pressure depending on the current flow, which passes through its coil windings. If the current flow increases, then the magnetic field created by the coil will move the solenoid’s plunger far away from the exhaust port. The output fluid pressure will keep decreasing when the exhaust port is opened, that is measured by the PC solenoid valve and it lowers the line pressure. The line pressure solenoid valve will look after the oil pump discharge pressure to fulfill the necessary driving condition in response to a signal which is sent from the (TCM).

What causes this problem with the Pressure Control Solenoid D Control Circuit High?

• The line pressure solenoid valve 'D' might be defective.
• There might be an opening in line pressure solenoid valve 'D' or the circuit might be shorted.
• The electrical connection of the line pressure solenoid valve 'D' circuit might appear to be weak.
• The level of the transmission fluid might be reduced.
• The transmission fluid might be dirty.

1. Powertrain control module - Illumination of the check engine light is a common symptom of faulty PCM. Change it immediately
2. Pressure control solenoid - Do you find the pressure control solenoid to be defective? Then they must be replaced instantly so as to avoid the P2721 error code getting stored in the vehicle
3. Transmission Control Module - Your transmission control module can be faulty if the fuel economy of your vehicle is too low. Fix it as soon as possible.
4. Automatic Transmission Fluid - The transmission fluid has to be clean without any dust particles. Replace them if they are dirty or contaminated.
5. Engine Wiring Connector - The terminals of the engine wiring connectors must be connected properly. Else it might get damaged easily. Get the engine wiring connectors for your vehicle from PartsAvatar.
6. Filters - Check the transmission filter if there are any blocks. If you find so, clear them off or get a new replacement from PartsAvatar.
7. Fuel Pump - Failure of the vacuum pump can impact the overall performance of the vehicle. Fix or change it as soon as possible.
8. Electronic Pressure Regulator - Do you see any black smoke from the exhaust? Then the electronic pressure regulator can be damaged. Get it fixed as soon as possible.
9. High Pressure Pump - Uneven idle after a heavy acceleration is a sign of damaged high-pressure oil pump. Get rid of it as soon as possible.
10. Transmission Valve Body - If you are on the lookout for the right replacement part, buy them easily to avoid P2721 error code from Parts Avatar.
11. Transmission Shift Solenoid - If you are on the lookout for the right replacement part, get them easily from Parts Avatar to avoid P2721 error code.

Have you ever wondered why is it so important to know the symptoms of the problem? Well, it is extremely essential to know the symptoms of the problem in order to detect it. Keeping this in mind, let’s throw some light on a few common symptoms of OBD error code P2721

Common Symptoms

• Fuel consumption by the engine is more.
• The transmission will refuse to shift properly.
• Check engine light will remain turned on.
• The transmission might start to burn.
• Rough shift by transmission and it keeps banging into the gear.
• Misfiring indications.
• The vehicle will reach the limp mode by the PCM.

To correct this issue you might need to undergo few replacements for the defective parts such as:

• Changing the fluid as well as the filter.
• Defective pressure control solenoid needs to be repaired and fixed.
• The faulty transmission valve body should be changed.
• The faulty transmission pump needs fixation.
• Flushing the transmission so that the blocks can be cleared.
• Clearing the rusty connectors.
• Changing the defective wires.
• Replacement of the faulty PCM.

If you need any parts to fix this problem you can easily find them with us. Not only that we also have in stock the best in range auto parts and that too at the most budget-friendly prices ever online. Whether you need a Transmission, PCM, Pressure Control Solenoid, Transmission Fluid, Transmission Control Module, Electronic Pressure Control Solenoid, Pressure Gauge, Connector, Shift Solenoids, Electronic Pressure Regulator, Torque Converter, High Pressure Pump, Transmission Filter, Transmission Valve Body, Transmission Pump, Transmission shift solenoid, Driveline you can simply rely on us for quality auto parts.

Here are some steps which you should follow in order to diagnose this fault code P2721:

Fluid & Wiring Inspections

• Firstly you have to check for the correct level of fluid and see if their conditions are good. Also, you can check for records as to when the filter and fluid of your vehicle were last changed.
• Now, perform a careful inspection of the wires for any possible defects. Also, you have to visually check the connectors and its connections for protection, erosion and damaged pins which includes the wires, connection to solenoids, PCM and transmission pump. By looking into the specific configuration, the transmission pump can be driven mechanically or electrically.

Advanced Steps

• The advanced step for each and every vehicle is specific and it needs suitable tools to accomplish diagnosis correctly.
• The process will need a digital multimeter and certain technical references for your vehicle. The requirement of voltage will differ based on particular models of your vehicle.
• So it’s always best to track specific troubleshooting chart. The need for voltage will vary based on the specific model of your vehicle.
• Depending on the transmission design and configuration, the need for fluid pressure will also vary.

Continuity Checks

• You have to inspect your vehicle for continuity by removing power and the readings of the connections should be set to 0 ohms or as stated by the manufacturer.
• Suppose there is no resistance or continuity, then it clearly shows that the wires are defective or there is opening or shorted wire which needs to be fixed.

Common Mistakes When Diagnosing the P2721 Code

• TCM is broken.
• Fluid level in transmission is less.
• Malfunctioning transmission shift solenoid.
• The wires might cause some problems.