P0748 Code - Pressure Control Solenoid 'A' Electrical

What does P0748 Mean?

The pressure control solenoid manages transmission line pressure by monitoring various driving conditions such as speed, engine load, and throttle position. It sends messages to the vehicle’s computer in order to facilitate the appropriate pressure for those specific conditions. Signals are sent in the form of voltage readings, and if these readings indicate fluid pressure which does not match the expected measurements, this code will set.

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What are the common causes of P0748 ?

Common causes include a faulty electronic pressure control solenoid, hydraulic blockages inside the internal transmission fluid passages, mechanical internal transmission failures, low transmission fluid, dirty or contaminated transmission fluid, a faulty PCM or transmission control module.



How do you troubleshoot P0748 ?

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

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