Error Code P0945: What It Means & What To Do?

<<See All OBD Codes

The trouble code P0945 can be explained as Hydraulic Pump Relay Circuit/Open. If the powertrain control module would detect an issue with the hydraulic pressure unit, then it would give rise to the P0945 error code. The particular code which is triggered depends upon the specific fault which the PCM has detected. If there is some issue with the automobile’s hydraulic pump relay circuit, then the P0945 fault code would start flashing up.

We believe that an investment in knowledge pays the best interest. So why not learn more about the P0945 error code? The transmission control system electronically controls the line pressure. It is then measured by the line pressure sensor. The line pressure which is desired would be compared to the actual line pressure. It would then be regulated by electronically changing the duty cycle of the pressure control solenoid. The line pressure would be calculated by the transmission control system as it is based upon the inputs from the transmission as well as from the car engine. A calculated torque input to the transmission is used as the main input to the desired line pressure calculation and is known as torque based line pressure. The transmission control module would then monitor the hydraulic pressure sensor. The TCM sets the OBDII code when the hydraulic pressure sensor would not be as per the factory specifications.

What causes this problem with the Hydraulic Pump Relay Circuit/Open?

• Malfunctioning hydraulic pump relay
• Hydraulic pump relay harness might be opened or shorted
• There can be inferior electrical connection in the hydraulic pump relay circuit 

1. Oil Pressure Sender - A faulty Oil Pressure Sender can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Body Control Module Component - If everything is alright with PCM, then there is surely some defect in Body Control Module Component. Get it replaced before the situation gets worse.
3. Powertrain Control Module - P0945 code can display due to some faults in the Powertrain Control Module. So it is very important to replace the Powertrain Control Module with us at equitable prices.
4. Auto Transmission Shift Solenoid - Do you remember when was the last time you got your car Auto Transmission Shift Solenoid checked up? A dirty Auto Transmission Shift Solenoid can cause a lot of issues like displaying P0945 code.
5. Air Pressure Gauge - Poor Air Pressure Gauge can cause a lot of difficulties, so why not get it replaced at time?
6. Auto Transmission Control Module - There can be some issues with the Auto Transmission Control Module due to which you may see P0945 code appearing over and over again. Visit us to buy best quality Auto Transmission Control Module online.
7. Engine Oil Pressure Switch - Are you facing some faults in your Engine Oil Pressure Switch? Don’t worry and get them replaced or else P0945 code can turn up.
8. Hydraulic Oil Temperature Sensor - Common cause behind this P0945 error code can be some fault in Hydraulic Oil Temperature Sensor. So it will be a good decision to replace them now. 

It is vital 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 P0945 here:

Common Symptoms

• Check engine light can start flashing up 

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Make sure to mend the inferior electrical connection in the hydraulic pump relay circuit.
• The malfunctioning hydraulic pump relay should be repaired or replaced as per the need.
• Adjust the flawed hydraulic pump relay harness.

Parts Avatar Canada endeavour’s to fulfil all the needs of its consumer, that’s why we have a huge collection of top quality Diesel Particulate Filter, Pressure Control Solenoid, Hydraulic Pressure Sensor, Line Pressure Sensor, Dpf Filter, Diesel Particulate Filter and many more at equitable prices. We won’t let you down in any way.

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

• The mechanic will use an OBD scanner, to inspect the error codes in the vehicle.
• By connecting a scanner to the diagnostic port of the vehicle, the mechanic or the technician can easily recover every of the stored codes and freeze frame data.
• Record this information, as it can be helpful for further diagnosis.
• At times, the shift solenoid itself can cause issue if it is damaged or broken.
• Once you carefully inspect every component, you have to reset the code. Once it is reset, test drive your vehicle to see if the codes reappear.
• If the error does not return quickly, then there can be an intermittent connection in the vehicle.

Common Mistakes When Diagnosing The P0945 Code

• Failure in the hydraulic pump relay
• Faults in the transmission control module
• Non performance of the wiring