P2704 - OBD Trouble Code

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The P2704 OBD code is the Transmission Friction Element "E" Apply Time Range/Performance. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

It is the transmission control module which would examine the control solenoid. This trouble code would be set by the TCM when the control solenoid would not be as per the parameters set by the manufacturer. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the Transmission Friction Element "E" Apply Time Range/Performance?

• There can be opened or shorted transmission control module harness
• ATF level might be low
• Grimy ATF
• Difficulties related to transmission mechanical
• Transmission control module (TCM) circuit poor electrical connection
• Malfunctioning wiring
• Flawed transmission valve body
• Obstruction in transmission hydraulics
• Quirks in the transmission control module

1. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness.
2. Transmission Control Module - The TCM monitors the functioning of the transmission system and will store this OBD code if the fluid pump does not function properly. Contrary, the TCM can also be faulty and might need reprogramming and replacement. Thus, replace it now!
3. Electronic Control Unit – The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.
4. Transmission Fluid Pump – Harsh shifts and audible transmission noise are the major symptoms of faulty fluid pump. This leads to decreased performance and chances of increased physical damages to the transmission components. Thus, replace faulty pump now!
5. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.
6. Diagnostic Tool – Usually any OBD code problem requires deep insight into the problem and high grade tools in order to fix it properly. Thus, buy quality diagnostic tools form us!

Willing to know some common symptoms of OBD Trouble Code P2704? Your wish is our demand. Have a look at them below:

Common Symptoms

• Automatic transmission fluid might start leaking
• Craggy handling
• Transmission might start sliding
• Uncertain shifting
• Divergent shift patterns
• There might be harsh shift selection
• The torque might be less
• Uncommon power output

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2704:

• The defective shift solenoid should be mended
• If you find out that there is a stoppage in transmission hydraulics, then it should be replaced or repaired as per the need
• Rebuild the mechanical issues in the transmission
• You must fix the less ATF level
• Replace the transmission control module circuit
• Recondition the quirky transmission control module
• Restore the grubby ATF
• Repair or replace the faulty transmission valve body
• If there is an opened or shorted transmission control module harness, then you must repair it

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

Initial thing which you must do is to verify the integrity of your automatic transmission fluid. You can use the dipstick to check the level of the A/T with the vehicle running and in park. This procedure varies a significant amount between manufacturers. This information can usually be found quite easily with the service manual in the dash or sometimes even printed on the dipstick itself! Just make sure that the fluid is clean and free from debris. If you do not remember ever doing a transmission service, it would be a good idea to check our records and service your transmission accordingly. You'd probably be surprised how dirty ATF can affect the functionality of your transmission.

You should always check ATF level on flat surface to acquire accurate readings. The manufacturer recommended fluid should always be used. Generally when you are attempting to search the connector/harness for this system, then you must search a junction connector. There might be one "master" connector, so just be sure that you are working with the right one by referring to your manual. The connector should be seated properly to ensure perfect electrical connection. Where the connector is situated on the A/T, it may be subject to vibrations that could cause connections to come loose or physically damage them. Not to mention, the possibility of ATF to saturate connectors as well as wires causing future or present problems. It is always a great decision to be aware of the overall condition of your automobile. There is a fact that other systems can directly affect other systems. Rough tires, worn out suspension parts, wrong wheel, all of these might cause problem in this system and there are some other causes as well. So that’s the reason why it is very important to get rid of this error code.

Common Mistakes When Diagnosing The P2704 Code

• Internal transmission related issues
• Quirks in the clutch solenoid
• Issues related with the car transmission control module