my cel light has been out for awhile and i just replaced it..so i start the car up and the light comes on, im like ooo great..so i just checked it and im gettin CEL numbers 12,21,31..12 says "direct power input to the PCM has been disconnected within the last 50 key-on cycles"..no idea what that means lol..21 says "Upstream H02S stays at center"..whats it mean by stays at center?..should i get this replaced? and 31 says " EVAP solenoid circuit" Which wouldbe any of these im guessing?..Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged...well ive been smellin that rotten egg smell lately so im guessin my CAT is goin?..im a lil confused on what im lookin for here lol



Mods: E-bay Intake, Vibrant Muffler, J Woodleys Ground Wire Kit, F&R Upper Strut Bars, B&M Short Shifter

21 is not a big deal. If you search you can find your answer for the evap code.

does 12 just mean that the ECU was unplugged or somethin?...i dunno how it woulda been..

Mods: E-bay Intake, Vibrant Muffler, J Woodleys Ground Wire Kit, F&R Upper Strut Bars, B&M Short Shifter

Originally posted by reeveso
does 12 just mean that the ECU was unplugged or somethin?...i dunno how it woulda been..

Bingo. Read the CEL page on the 2GNT.com main site please.

i did..im just not very familiar with what everything in cars are called..kind of new with them still lol ive only been into them since like..right before the summer started, but im gettin there...but i think i dont hafta worry about them, 12 is just that the battery was unhooked (yes), 21 i guess i shoudlnt worry about? even tho im still gonna get that checked out..my gas mileage is amazing tho i just clocked it at 34mpg last week,and 31 people say is there for like everybody and no1 can figure it out, but im almost positive its my CAT

Mods: E-bay Intake, Vibrant Muffler, J Woodleys Ground Wire Kit, F&R Upper Strut Bars, B&M Short Shifter

Nooooooo You got it wrong! 31 Is the code that tells you your CO-DRIVER is on board!! I have been searching like many others, for a fix other than removing the light! That one you could be stuck with for a spell.

Originally posted by reeveso
my cel light has been out for awhile and i just replaced it..so i start the car up and the light comes on, im like ooo great..so i just checked it and im gettin CEL numbers 12,21,31..12 says "direct power input to the PCM has been disconnected within the last 50 key-on cycles"..no idea what that means lol..21 says "Upstream H02S stays at center"..whats it mean by stays at center?..should i get this replaced? and 31 says " EVAP solenoid circuit" Which wouldbe any of these im guessing?..Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged...well ive been smellin that rotten egg smell lately so im guessin my CAT is goin?..im a lil confused on what im lookin for here lol Mods: E-bay Intake, Vibrant Muffler, J Woodleys Ground Wire Kit, F&R Upper Strut Bars, B&M Short Shifter

12 means the ecu has been reset within 50 key cycles
21 o2 is not cycling like it is supposed to be...replace it
31 check all hoses for clogs, all wiring to make sure no breaks at the plugs, purge solinoid may very well be bad..you are correct
12 = end of codes

Terry



96 Eagle talon ESI
Greddy header - Greddy exhaust

97 Eclipse
Star Stage II - Boost/oil/EGT gauges - 3" custom DP/Apexi N1 3" exhaust - SFMU/return line - Apexi SAFC - Stage 2 6 puck Sprung hub MIBA clutch - Shortened shifter - Koni Yellows w/eibach prokit - Stillen Fr/Rr swaybars - ceramic intake - DEI Keyless entry alarm - Niche 17" Shoks

Waiting to be installed: HKS EVC IV, 450 Turbo injectors, GSX Front brakes (need rotors)