If your car is showing the P0944 engine code, there is a loss of pressure in your hydraulic pressure unit. This is an extremely serious issue and should be diagnosed immediately. If not, your car won’t move as the transmission will not engage.
Diagnostic trouble codes (DTCs) help identify problems that your car engine is having. While an OBD-II code reader allows you to see which codes are active, you’ll need to understand what the different engine codes mean to evaluate the problem and find the solution.
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Jerry has expert information on DTCs so that you can protect your car, as well as savings on car insurance. In this article, we’ve consolidated the information you’ll need about the P0944 engine code and how much it would cost to fix.
What does the engine code P0944 mean?
Definition: Loss of hydraulic pressure unit prime (loss of pressure)
The P0944 engine code indicates a problem with your car’s hydraulic pressure unit losing pressure, which is vital for providing hydraulic pressure to the motors, cylinders, and other parts of the hydraulic system.
This code is most commonly used by Dodge and Jeep vehicles as well as in some Volkswagen vehicles.
How much will it cost to fix?
Running a diagnostic for the P0944 will cost one hour of labor, which will come out to $75 to $150 per hour.
What can cause the P0944 engine code?
If your car is showing the P0944 engine code, there may be a faulty component in the transmission hydraulic pressure unit or pump which is causing a significant drop in pressure.
The hydraulic pressure unit includes a motor, fluid reservoir, and a pump to form a self-contained unit. The unit applies hydraulic pressure to drive the motors, cylinders, and other parts of the hydraulic system.
Other potential issues that could cause this engine code include:
Transmission fluid is low
Failure of the transmission pump
Blockage in a transmission fluid channel
Transmission cooler return filter is loose
Main regulator valve is stuck
Transmission filter or seal is cracked or incorrectly installed
Common symptoms of the P0944 engine code
You may not see many symptoms accompanying this engine code other than the check engine light turning on. Other potential signs to watch for include:
Delayed transmission shift
Transmission not shifting at all
How serious is the P0944 engine code?
The P0944 engine code is very serious and should be dealt with immediately since it is a transmission-related issue. Without fixing the problem, your car may be unable to move at all since the transmission is unable to engage.
Can I fix the P0944 engine code myself?
It may be possible to fix the P0944 engine code at home, but you must diagnose the issue correctly before beginning any repairs. Depending on the source of the problem, you may need to:
Replace a damaged or clogged transmission filter
Replace a damaged internal seal and topping off fluid
Refill the transmission fluid
Incorrectly performing these fixes could lead to high repair costs. If you’re not sure what repairs your car needs, it’s a good idea to bring it to a professional for a thorough diagnostic inspection and repairs.
Repairing the hydraulic pressure unit
If you do decide to repair the P0944 code yourself, you’ll need to follow these steps:
Identify the correct parts and transmission fluid your vehicle takes
Inspect the hydraulic pump unit to find any damaged components. Run the engine for a few minutes before checking the transmission fluid levels with the dipstick
Disconnect the car battery before any repairs
Clean the clogged transmission filter with disc brake cleaner and use a toothbrush to dislodge any particles stuck to the filter
Refill the transmission fluid through the dipstick hole until it reaches the “warm” line
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