2002 ford focus. PO751 computer readout. replaced SSA 9
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The code is set not by an electrical fault, but when the PCM detects a mechanical or hydraulic failure of the system. The shift solenoid can be tested by accessing the Green/Yellow (GN/YE) wire at pin 73 of the PCM. Disconnect the PCM and toggle a momentary power supply to the wire. This should energize the shift solenoid and make it click. If the solenoid does not click when powered up, it has most likely set the code from a mechanical failure. If the solenoid does click when energized, the problem is either intermittent or there is a hydraulic failure inside the transmission which would require in-depth diagnosis and repair.
23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
2002 Ford focus zetec Already Tried:
difficult shift between 2-3rd. code PO751 up on computer readout.replaced solinoid A , filter, fluid. still sticky but functional. 1 week later, no third gear at all.Daughters car. ran it for a week like that. (girls!!!). drained and replaced fluid/filter again last night with no effect. first-second shift perfect, no third at all.