my saturn vue wont shift once it warms up it is a 2004 with a 3.5 engine awd
i have replaced the input and output sensors. still doesnt work it throughs a
po501 code and has thown a po741 and a po502.when cold it drives ok.how
do i know what transmition i have and what do you think is wrong with it .?
The P0501 and P0502 trouble codes are for the vehicle speed sensor (VSS). That's what needs to be looked at there. For the P0741 trouble code that's the torque converter clutch valve in the transmission. That code may be popping up because of the problem with the VSS. The two work together. So I'd fix the VSS problem first, clear the computer and then see if you still have trouble with the P0741 trouble code. If you do still get the P0741 trouble code it's not a major disaster. It'll probably be the torque converter clutch solenoid sticking. It's not a real cheap fix, probably around $600 to $800. About 15 years ago my Sister had the same thing done on a '93 Cavalier she owned. At the dealer, back then, it cost her around $400. In 2013 a guy at work bought the car from my Sister and the transmission still works perfectly fine. Neither issue is cause for the whole transmission to be replaced. HTH. -Jim
I have changed both the speed sensors. What would be next? Where is the torque converter solenoid located on the transmission? Should I change that?
The torque converter clutch solenoid and valve are inside the transmission. Did you replace the VSS for the transmission or are you talking about the one(s) for the anti-lock brakes? That's a different speed sensor. The speed sensors for the anti-lock brakes are wheel sensors and located at the wheels. The VSS is on the transmission. HTH. -Jim
I changed the input and output speed sensors on the transmission.
Check the wiring going to them. P0502 is Vehicle Speed Sensor low circuit input. Sounds like it may be a wiring problem. HTH. - Jim
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