get it fixed, are you going to diagnose and repair and A/T?
that car is a 1/2 GM/ Daewoo car. a sad mix of parts. (sell it? i would )
the service book is here. $4
This is called an FSM.
783 (p07xx means tranny issues)
Trouble Code: P0783 (2.0L L4 VIN - Auto)
3 - 4 Shift Malfunction
Print this code data
comments in (xxxx)
Trouble Code Conditions:
(preconditions before test)
Transaxle oil temperature is greater than -10 °C (14 °F). Selector lever is not N (Neutral), P (Park) position. (warm , in gear)
System voltage is greater than 9 V.(car battery not dead)
No input speed error DTCs P0715, P0716 and P0717.
Speed sensors not dead.
Output speed is greater than 256 rpm. (tail shaft rpm (speed)
Input speed is greater than 400 rpm. (engine rpm after clutch)
3 - 4 gear shift is active. (the TCM commands shifts to 4th)
- Circuit to solenoids bad.
- ECM, bad.
- TCM bad or inputs wrong.
- end quote.
this means, in pure physics.:
the transmission slip's
what that test failure means it bar stool talk is this.
I shafted to 4th but the MPH is too slow, so the transmission
is not shifting to 4th , or it slips
any mech would drive the car first. (did he?)
and flog it up hills (in Kansas? omg)
TO SEE, if it slips in 4th or fails to shift at all.
- fresh ATF? and filter? serviced and levels good on A/T
- is the 4th gear command to the shift solenoid good.?(logic)
- if trans slips? (fails FSM book stall tests) bad tranny.
- if the trans fails stall , check line pressure per FSM.
like that, and more, lots to say on A/T
If in uSA find a real , shop, with ASE techs. and win.