What Codes Will This Page Cover?
- P0746 Diagnostic Code-Pressure Control Solenoid “A” Performance/Stuck Off
- P0747 Diagnostic Code-Pressure Control Solenoid “A” Stuck On
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What Is the P0746 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
Diagnose
Difficulty of Inspecting
Get Additional Help
P0746 and P0747 codes often pop up whenever there is a problem with your vehicle’s hydraulic pressure transmission system, which is designed to transfer power from your vehicle’s engine to the drive wheels.
More About the P0746 and P0747 Codes?
The P0747 code is displayed whenever the gear selected by the engine control module (ECM) does not match the actual gear when you are driving.
On the other hand, the P0746 code is indicated when the required transmission fluid pressure in your car’s transmission system does not match the level of pressure detected by the Powertrain Control Module (PCM).
The error code pops up whenever your PCM system is unable to control the pressure control solenoid of the transmission system.
The incident often occurs when the solenoid or powertrain control module is faulty.
What Are the Symptoms of a P0746 Code?
The symptoms of the P0746 and P0747 codes may vary depending on the model and make of your car. Generally, you are likely to note the following:
- Low gas economy
- Drivability issues
- Check engine light
- Challenges when shifting from one gear to another
- Performance problems
- Transmission shift shock
What Are Some Causes of a P0746 Code?
The P0746 and P0747 codes indicate transmission problems resulting from varying causes, including:
- Contaminated or dirty transmission fluid
- Low levels of transmission fluid
- A clogged transmission filter
- A malfunctioning powertrain control module
- Defective wiring in the pressure control solenoid
- Damaged or corroded connectors
- Transmission valve or pump defects
- Restricted hydraulic fluid passages
How Serious Is the P0746 Code?
A P0746 code means your vehicle’s computerized system isn’t in full control of your car’s torque converter or transmission.
As such, you are likely to experience various problems, including overheating, a stalling engine, and a non-working or slipping transmission.
The P0747 code on your PCM indicates problems with the operation of the gear-shifting function. The code shows a high-priority issue that should be addressed to prevent malfunctions relating to gear changes.
Can I Still Drive with a P0746 Code?
If your vehicle is unable to change gears or is experiencing transmission challenges, then it may be impossible to drive it.
However, it is important to note that the P0746 and P0747 diagnostic trouble codes may sometimes show up on a drivable vehicle, especially when the error codes are a result of a faulty PCM. Even then, you should only drive to your home or professional help center if it is a short distance away.
Generally, it is not advisable to continue driving for a long distance until you have established the cause of the P0746 or P0747 code errors and the related problem. To be on the safe side, always tow the vehicle to a service station.
How Easy Is It to Diagnose a P0746 Code?
Diagnosing problems related to P0746 and P0747 diagnostic codes is a lengthy and challenging process.
Perhaps the easiest thing you can do is check your transmission fluid’s level and color (for signs of burning) using a dipstick.
This simple fluid check technique should help you determine whether your vehicle has been running on contaminated or low levels of transmission fluid.
You can also check the pressure control solenoid for any visible electrical connection problems. If you can’t find any faults, then it is time to seek professional help.
How Difficult Is It to Inspect a P0746 Code?
The process of inspecting your vehicle after getting a P0746 or P0747 error code is not easy either.
As such, you should avoid any form of inspection since improper handling of parts may complicate the problem.
Always seek professional help from a technician as they are able to identify possible causes of the error codes and institute measures that will help you avoid them in the future.
Need Additional Help with Your P0746 Code?
The P0746 and P0747 diagnostic codes may indicate a mild or serious problem in your vehicle’s transmission system, which may affect its overall performance.
It is, therefore, important to look for reliable repair shops from Kelley to get professional help.
And if you are interested in learning more about car error codes and how to diagnose your vehicle’s problems, then the KBB OBD-II database is the perfect place to start your journey.
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