Hi,
If you are referring the the monitors for gas mileage, fuel used, etc., which is displayed in the overhead console of the van, then it is pretty easy to reset them. But note that all of the displays can NOT be reset (such as instant mileage, and air temperature.
To reset the values, just display the one you want to reset, and then press and hold both button on both sides of the display. You will have to hold them for a few seconds, then the display will flash ALL of the indicators, and that will reset that particular display (such as fuel used). You will have to do this for each of the displays you want to reset, as they can NOT all be done at the same time.
I have included a link to a picture of the display and the buttons. Just scroll all the way to the bottom of the page when you get there.
unhook the positive on the battery for 5 min. This should reset your check engine light if it doesnt then you still have issues.
if you don't have a proper scan tool to reset it, then the only other way is to disconnect the battery for 5 minutes. warning : the radio and clock, etc will reset also & the radio security lock could activate (radio would then not work until reset)
It's 1-2-3-4-5-6 Sid
Just unhook the battery cables for 5 mins, That will reset the ECM
1-2-3-4-5-6 Click the link.
There is no reset for the computer. You can disconnect the negative battery cable for 5 minutes and this may or may not reset any fault codes. If not they will have to be reset with an OBD2 scan tool.
Your Venture probably came equiped with 3.4L V6 LA1 engine. In which case, the firing order is 1-2-3-4-5-6.
Just unhook the positive battery cable for 5 mins.
Turn key OFF and just unhook the NEGATIVE battery cable for 5 mins and the computer will reset it's self.
5 to 6 miles at the most.
Trouble code P1639 means: 5-Volt Reference (B Or 2) Circuit
Underneath the van, in the area where the exhaust pipe comes from the engine. Number 5 is on driver's side, followed by 3 then