Error Code P0973: What It Means & What To Do?

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What does P0973 error code mean? Is your shift solenoid ‘A’ valve broken? Is the transmission fluid dirty? Then you will notice that the shift solenoid ‘A’ valve is faulty which gave rise to the P0973 error code. The activation and deactivation of the shift solenoid are handled by the transmission control module. This helps for smooth shifting of the transmission by changing the gear ratios. The clutches, brakes, and bands are operated by the shift solenoid ‘A’, and if the readings are abnormal, P0973 code will be stored by the PCM and the control circuit will be closed.

The hydraulic pressure in the transmission is handled by the TCM which uses the shift solenoid. This is especially used to apply clutch packs in the transmission so that when the vehicle applies different gear ratios, it will proficiently propel down the road in the right direction. If suppose, the pressure control solenoid does not function as expected, then the P0973 error code will be stored.

What causes this problem with the Shift Solenoid "A" Control Circuit Low?

• The shift solenoid valve ‘A’ is broken.
• The wires and connectors of the system are defective.
• The control circuit is damaged.
• The transmission fluid is less or below the required level.
• As a very rare case, you will notice the ECM, TCM, and PCM to be faulty.

1. Shift solenoid valve – Do you expect your vehicle to function normally? Then replace the faulty shift solenoid valve.
2. Transmission control module – A faulty or broken TCM has to be get ridden off immediately to avoid this P0973 error.
3. Powertrain control module – A failure in the powertrain control mode can give rise to the P0973 error code. Change the PCM immediately.
4. Engine control module – Replace or repair your ECM as soon as possible so that it functions effectively.
5. Connectors – Visually inspect the connectors for any possible damages. Quickly replace them so as to avoid further troubles.
6. Engine wires – Is the engine wire broken or corroded? Get the replacement part for engine wires from Parts Avatar.

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 P0973 here:

Common Symptoms

• If the P0973 error is found, the illumination of the check engine light will be found on the dashboard. Few vehicles will find it difficult or will be unable to shift to particular gears which will eventually result in drivability problems like rough shift and irregular acceleration. You will also notice that the fuel efficiency is reduced.
• Consumption of fuel is more.
• Improper shift transmission. 

It is very important to fix the fault code P0973. So here are some ways with which you can correct this issue:

• Shift solenoid valve ‘A’ has to be changed.
• Harness, wires, circuits, and connectors have to be replaced.
• Replacing or adding the transmission fluid.
• Very rarely, you must change the PCM, TCM or ECM.

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

• In general, a trouble code scanner is used in order to address the P0973 error code. An experienced mechanic will assess the code by looking at the freeze frame data and see if there are any other additional error codes. If he finds out that, there is an error code, he will then inspect them in the order which is displayed in the scanner. Then the codes will be reset and the mechanic will restart the vehicle to see if the error codes appear again. You will know that the error was identified by mistake or there can be an erratic signal.
• Furthermore, the mechanic will then inspect the electrical components if the error code still remains the same. Any wires, connectors must be carefully checked and quickly replaced if the wires are shorted or if there is any opening.
• After this, the mechanic will carefully check the transmission fluid to see if it is at the correct level or if it dirty? Fully contaminated fluid will be replaced with new fluid as it can cause severe damage to the transmission, where the component has to be replaced immediately.
• With the help of a DVOM, the mechanic will be able to easily find out as to which circuit agrees with the shift solenoid ‘A’ valve and every wires and harness will be carefully inspected.
• After this process, the mechanic will once again reset the trouble code and test drive the vehicle to check for its appearance. This is mainly done to help the mechanic to know if the problem is solved or not.

Common Mistakes When Diagnosing The P0973 Code

One of the most common mistakes, as you diagnose the P0973 error code is - failing to follow the diagnosis procedure. The mechanic has to follow this procedure throughout the diagnosis process to make sure that the repairs are carried out carefully. In most cases, the shift solenoids will be replaced by mistake whereas the actual problem lies with the faulty wires or transmission fluid that is insufficient.