down_shift

iTrader: (12)

Give it a shot since it's like 20 bucks to try those.. but I don't think anyone has fixed this problem in a budget minded manner lol.

Netacoma2003

I tried UTEC tuning the stock ECU on my auto Z first. Did not throw any codes but idle in P or D wasn't smooth and the RPM "surged" by about 500 RPM when coasting downhill or towards a stop.

Then I had the ECU flashed by Technosquare. Now I'm getting P1283 codes all the time. Idle in P or D has been smoothed out, however, my RPM still "surges" when coasting downhill or towards a stop but only by 250 RPM.

Bumble_Zee

iTrader: (33)

even with UTEC or FLASHED ecu I believe it would still throw a code since MAF senses more airflow than normal, so computer will sense that "it's not getting enough fuel when it does"... i.e. F/I guys. They have their EMS tuned for optimal A/F ratio but still have these codes. I think as of now the O2 simulator would be the only fix to these or a black piece of tape over the SES light . Please don't quote me, these are simply my own opinions.

oolatec

Holy thread bump Batman...

So has anyone actually solved the P1283/1274 codes, or did everyone just give up?

shakuya88

In my head, it seems to be a phantom code that does nothing to the way the car drives. Just comes on to alert you to a problem that doesn't exist. If your on Osiris, just have the code your getting disabled....problem solved...lol

1991ls13

sorry for re-birthing this thread, but i didnt want to start a new one for a simple question. I have these codes as well....I just put on some test pipes so im thinking thats why...Am i correct and is this ok to keep driving???

nathanwl2004

iTrader: (2)

Osiris reflash the ecu and turn off all the sensors you dont need to pass emisions.

cctaylor1988

So what if you have this code but no tuning kits etc :/ I have done no after markets mods to my car and have this code ugh