Car CODES... HELP!!!!

My CE light came on and got it checked out and it read P0730, P1811 and 1441EVAP. Info about car: 1999 Pontiac Grand Prix GT 120,000miles and about 3 days ago got my O2 sensors replaced and fuel pump replaced then these readings came on. Last Jan. of 2007 I did tune-up and trannny flush and now the fluid is black so yesterday I changed the tranny fluid again worked fine for a day but now its not shifting right, just revs high as I floor it.

Welcome to AF!!

Except for the Evap code the other two codes indicate transmission issues. I suspect that the transmission is probably getting ready to go out. I would take it to at tranny shop and have them look at it to see if they can fix the problem without having to disassemble the tranny but I susptect you are probably in for some repairs. The 0730 code indicates incorrect gear ratio and the 1811 code indicates late shifts. The 1441 code has to do with the evap emissions system and could be due to a bad solenoid.

I hope this helps you out. Unfortunately I think the tranny flush after 60K miles may have done damage to the transmission and now you are paying the price. Good Luck!

Which solenoid is bad for 1441?

Hey, GTP DAD do you mean canister purge solenoid?

It would be the evaporative emissions purge solenoid since the DTC indicates it may be stuck open. It is located at the engine passenger side right in front of the UIM. Just follow the vacuum lines.

Thanks for catching that response for me Bob!