P0948 - OBD Trouble Code

<<See All OBD Codes

The trouble code P0948 can be elucidated as Hydraulic Pump Relay Circuit High. 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.

Want to learn something more about the P0948 fault code? If the powertrain control module would detect an issue with the hydraulic pressure unit, then it would give rise to the P0948 error code. The particular code which is triggered depends upon the specific fault which the PCM has detected.

What causes this problem with the Hydraulic Pump Relay Circuit High?

• Unusable hydraulic pump relay
• There can be opened or shorted hydraulic pump relay harness
• Poor electrical connection in the hydraulic pump relay circuit

1. Oil Pressure Sender - Defective car Oil Pressure Sender can be a major reason why P0948 code depicts. So make sure to replace it online so that you don’t have to face any further issues.
2. Auto Transmission Control Module - Everything is okay with the Oil Pressure Sender and still OBD code P0948 triggering? Then there must be some defects in Auto Transmission Control Module. Replace them as soon as possible.
3. Powertrain Control Module - P0948 code flashing? Get your Powertrain Control Module inspected from a mechanic.
4. Auto Transmission Shift Solenoid - If everything is alright with PCM, then there is surely some defect in Auto Transmission Shift Solenoid. Get it replaced before the situation gets worse.
5. Hydraulic Oil Temperature Sensor - P0948 code can display due to some issues in the Hydraulic Oil Temperature Sensor. So it is very important to replace the Hydraulic Oil Temperature Sensor with us at equitable prices.
6. Engine Oil Pressure Switch - Do you remember when was the last time you got your car Engine Oil Pressure Switch checked up? A dirty Engine Oil Pressure Switch can cause a lot of issues like displaying P0948 code.
7. Air Pressure Gauge - Poor Air Pressure Gauge can cause a lot of difficulties, so why not get it replaced at time?
8. Body Control Module Component - Are there some faults in your Body Control Module Component? Don’t waste time and get them replaced or else P0948 code can turn up.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• Illumination in the service engine soon light

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• You must fix the defective hydraulic pump relay harness
• Repair or replace the quirky hydraulic pump relay circuit
• The hydraulic pump relay should be restored to working order
• Recondition the non-functioning powertrain control module

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of Diesel Particulate Filter, Pressure Control Solenoid, Hydraulic Pressure Sensor, Line Pressure Sensor, Dpf Filter, Diesel Particulate Filter and many more. Now all your problems would vanish within no time.

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

• The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle.
• After performing a careful inspection, every of the stored codes and freeze frame data are retrieved as it can help down the way for further diagnosis process.
• Most often he has to inspect the solenoid itself to see if they are faulty or damaged. Additional error codes that are stored in the vehicle are also addressed.
• The mechanic performs a continuity test between the PCM and solenoid to check the resistance.
• If the solenoid or the control modules are not faulty, he will then retune the code and test drive the vehicle.
• On test driving, if the P0948 code does not return soon, he will know that an erratic condition exits.
• But if the error returns instantaneously, he will check every component as well as the circuit like connectors, wires, harness, fuses etc for any possible fault.

Common Mistakes When Diagnosing The P0948 Code

• The hydraulic pump relay might start failing
• There can be some defects in the transmission control module
• Some issues related to the wiring