09camaro383

iTrader: (2)

HI GUYS I TOOK MY CAMARO 98 TO GET PROGRAMMED AND WAS TOLD THAT THE PCM DID NOT NOTICE IF YOU CHANGE IT FROM PARK TO DRIVE I WAS TOLD TO CHECK PRNDL SWITCH I HAVE A 4L60E BUT I DON'T KNOW WERE THE SWITCH IS LOCATED OR WHAT SENDS THE SIGNAL TO THE PCM HELP!! Thanks

joecar

It is on the gear selector lever under the center console.

09camaro383

iTrader: (2)

I think you are right!! i was doing some checks and found out my trans fluid was low almost 2qt and probably did not have a good pressure to see a difference does it makes sense

09camaro383

iTrader: (2)

good pics!! i run my car for about 15 miles and only made short trims to the store hopefully my inside of the trans doesn't look like that!! it is shifting good!! my mistake was when i added a trans cooler and did not double check my level!1 Thanks for your help!!

joecar

What Bro Inc said is true... there is a little more to it...

The PCM has pids for both PRND321 and PN... are you saying the PCM is not indicating PRND321 or not indicating PN...?

The engine calibration has idle/air tables for PN and IG (in-gear)... for engine idle/air the PCM determines PN/IG from the PN switch... if your tuner was editing those idle/air tables, he may have noticed that the PCM was not switching between the PN and IG tables.

If PRND321 was not indicating correctly, the PCM would detect this and possibly set DTC P1810.

09camaro383

iTrader: (2)

Thanks a lot now i know how the PRND321 switch and the PN switch works and communicate with the pcm!! the tuner only said "pcm not noticing if is on park or drive and to check the PRND321 switch" and i said OK!!