OBD-II Trouble Code Technical Description

Pressure Control Solenoid A Electrical

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What does that mean?

This is a generic transmission diagnostic trouble code (DTC) and typically applies to OBD-II vehicles equipped with an automatic transmission.That may include but is not limited to vehicles from Ford, Mercury, Lincoln, Jaguar, Chevrolet, Toyota, Nissan, A...

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What is the severity of this DTC?

The severity of this code normally starts as moderate, but it can progress to a more severe level rapidly when not corrected in a timely manner.

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What are some of the symptoms of the code?

Symptoms of a P0748 trouble code may include:

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What are some of the common causes of the code?

Causes for this P0748 transmission code may include:

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What are some P0748 troubleshooting steps?

Prior to beginning the troubleshooting process for any malfunction you should research the Technical Service Bulletins (TSB's) for the specific vehicle by year, model and transmission. In some circumstances this can save a lot of time in the long run by pointing you in the right direction. You should also check the vehicle records to verify the last time that the filter and fluid was changed if possible.

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Fluid & Wiring Inspections

The first step is to check the fluid level and examine the condition of the fluid for contamination. Prior to changing the fluid, you should check the vehicle records to verify the last time that the filter and fluid was changed.A detailed visual inspection to check the condition of the wiring for obvious defects is next. Check the connectors and connections for security, corrosion and damaged pins. This should include all wiring and connectors to the transmission pressure control solenoids, the transmission pump and the PCM. Depending on the configuration, the transmission pump may be electrically driven or mechanical driven.

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Advanced Steps

The advanced steps always become very vehicle specific and require the appropriate advanced equipment to perform accurately. These procedures require a digital multi meter and the specific technical references for the vehicle. You should obtain the specific troubleshooting guidelines for your vehicle prior to proceeding with the advanced steps. Voltage requirements may very based on the specific model of the vehicle. Fluid pressure requirements will also vary based on the transmission design and configuration.

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Continuity Checks

Unless otherwise specified by the technical data, the normal readings for wiring and connections should be 0 ohms of resistance. Continuity checks should always be performed with the power removed from the circuit to avoid shorting the circuit and creating more damage. Resistance or no continuity is an indication of faulty wiring that is open or shorted and must be repaired or replaced.

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What are some common repairs for this code?

Possible misdiagnosis may include:Hopefully, the information in this article has been helpful to point you in the right direction to correct the problem with your pressure control solenoid trouble code. This article is strictly informational and the specific technical data and service bulletins for your vehicle should always take priority.

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Related DTC Discussions

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Need more help with a P0748 code?

If you still need help regarding the P0748 trouble code, please post your question in our FREE car repair forums.We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. All information on this site is copyright protected.

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