p0944 loss of hydraulic pump prime supplier

The P0944 code is defined as a loss of pressure or “prime” for the transmission’s hydraulic pump. It is most common with Dodge/Jeep vehicles, but is also used by some other manufacturers, including Volkswagen.

If your car’s Check Engine Light comes on and the P0944 code is stored, it means that the computer has noticed a significant drop in transmission pressure and that the pump has both lost its prime and failed the prime test. The prime test is run when the transmission slips while in any forward gear, and a no pressure situation is indicated by all pressure switches.

While the P0944 code indicates a loss of pressure and prime at the pump, there are a number of actual causes for the problem. These include the following:

There may be one or more symptoms experienced with the P0944 code, depending on the severity of the situation and how long it has existed. Symptoms can include:

Diagnosing the P0944 code starts by connecting a handheld diagnostic scanner to the car’s computer. The mechanic will read all the codes stored in the computer. Generally, the codes will be cleared and the vehicle test driven to determine if the codes will reset.

The mechanic will also conduct a shift lever position test using a scan tool. If the shift lever position test is passed, the mechanic will move on to testing the pressure in the transmission line. This is done with a scan tool and the engine operating, with the transmission in park. Note that the transmission should be at operating temperature for this test to be accurate. Depending on the results of this test, the mechanic may also need to test the transmission line pressure in both drive and reverse using the scan tool.

The mechanic may also need to check the internal seal for signs of leakage. If there are signs of a leak, the seal will need to be replaced. If there are no signs of leakage, the pump may need to be replaced. It may also be necessary to remove the transmission fluid pan and inspect the filter for signs of damage.

One of the most common mistakes with the P0944 code is not allowing the transmission to come to normal operating temperature before testing pressure. This is necessary because fluid pressures are higher when the transmission is cold, which can cause false negatives to the test.

The P0944 code is very serious, and it should be diagnosed and repaired immediately. If the problem is left unhandled, it could result in a situation in which the transmission will not engage at all, meaning that your car will not move.

Transmission related problems are always serious concerns. If you’ve noticed the Check Engine Light on and transmission operation problems, it is vital to have the situation diagnosed immediately. However, note that P0944 is not used by all manufacturers, so it is possible to experience similar symptoms but not have this particular code stored in the computer.

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Error Code P0944 is defined as Hydraulic Pressure Unit Loss of Pressure. This is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made since 1996 up to the present. Of course, specifications on the definition, troubleshooting, and repairs vary from one make and model to another.

When this code appears, it means the Powertrain Control Module (PCM), also known as the vehicle’s computer, has determined a significant drop in the transmission pressure, and the pump lost its prime and failed the prime test. The prime test is done when the transmission slips while in any gear that indicates forward and has no pressure situation from all pressure switches.

Using the scan tool, conduct a shift lever position test. If it passes the shift lever position test, test the pressure in the transmission line. Use the scan tool while the engine is running and the transmission set at park position. The transmission should be at operating temperature for this test to be accurate. Depending on the result of this test, you may need to test the transmission line pressure for both drive and reverse transmission positions using the scan tool.

One of the common mistakes in diagnosing this code is not allowing the transmission to run at normal operating temperature before testing, as this could give inaccurate or false negative results.

The P0944 DTC is often used on VW and Chrysler Corp. vehicles when the transmission pump stops making hydraulic pressure. This is a serious OBD2 code, and should be addressed immediately.

The P0944 diagnostic trouble code is actually one of the most severe transmission OBDII trouble codes that you can have. If the transmission loses hydraulic pressure, it will literally not be able to function. When this happens, severe internal damage will occur.

The best way to diagnose a P0944 OBDII trouble code, is to perform a transmission line pressure test. This will tell the technician whether or not the transmission pump is creating enough hydraulic pressure.

1. Cycle the ignition switch on and off three times, halting at the “ON” position. *Tip: You must cycle the key on and off rapidly while pressing the key into the ignition switch. If you move too slowly the odometer will indicate mileage, and you will need to start again.

2. If you have conducted the procedure correctly, all fault indicators will remain illuminated and six dash marks “------“ will display in place of the odometer mileage.

5. Of course, Chrysler/Jeep does not provide a means for resetting MIL’s, this process is for reading codes only. This will need to be done with a scan-tool once the appropriate repairs have been completed.

6. Some repairs will automatically turn off the MIL after a certain number of engine run cycles. However, the DTC will remain stored until it is cleared with a scan tool. It is important to clear DTC’s after a repair to prevent confusion when dealing with future MIL triggers.