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What is this code?

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Old May 3, 2005 | 04:02 PM
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1999TransamWs6's Avatar
1999TransamWs6
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Default What is this code?
I just trew a code and when i scanned it with hpt it read- P0748 Pressure control solnoid circuit electrical. What is this?
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Old May 3, 2005 | 11:00 PM
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good question. one that i have posted and no answer. wat i can tell you from my car is that is immature thus not to frequent. the pressure control solenoid controls the line or "reads" the line pressure in your trans.

mine sets this code but only on some 50% or more throttle, i think. its strange...

anyways, i noticed that when i do get it, my values for the trans all go to zero. i have tried replacing the solenoid but im still getting this code. not sure wat it could be, it might be my shift kit or it might not.

good luck!!!
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Old May 3, 2005 | 11:00 PM
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do you have a transmission that's vacuum modulated?
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Old May 4, 2005 | 03:01 PM
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The tranny is a stock 4l60e with a transgo shift kit and a vig 3200 stall converter.
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Old May 4, 2005 | 03:06 PM
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hmmm... do you have your line pressure raised at all ? (via a tuner, HPP3, Predator, etc...?)
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Old May 4, 2005 | 03:29 PM
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No I have never Raised the line pressure.
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Old May 5, 2005 | 12:50 AM
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would raising or decreasing the force motor values help wth this code?
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