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The most common cause of the DTC (Diagnostic Trouble Code) PO750, is a defective shift solenoid, which is located in the Main Control Valve Body-Assembly, (FOR INSTRUCTIONS CLICK HERE).
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In order to properly diagnose you will a NGS (New Generation Star) scan tool or equivalent AND A dvom (DIGITAL VOLT OHM METER), see below. Hope this helps you out.
Pinpoint Test A - Shift Solenoid
P0781, P0782, P0783, P1731, P1732, P1733 - Shift errors.
P0750, P0755, P0760 - Solenoid circuit failures.
P0751, P1751 - Shift solenoid number 1 malfunction.
P0756, P1756 - Shift solenoid number 2 malfunction.
P0761, P1761 - Shift solenoid number 3 malfunction.
This pinpoint test is intended to diagnose the shift solenoids electrical system only. To prevent replacement of good components, be aware that the following areas may be at fault:
This pinpoint test is intended to diagnose the following components:
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