2007 Aveo 5 lean and rich codes at the same time? i need help.

[kevin1]

Right to it. I changed the valve cover gasket cuz i noticed oil on the plugs, the day after that my vehicle shot a p0172, this wad 60 days ago. Since then....ive been to dmv twice, failed emissions twice, changed, the air intake tube along with IAT, SPARK PLUGS, WIRES, COILS,
TOP O2 SENSER, AIR FILTER, PCV, RAN FUEL INJECTOR CLEANER THROUGH GAS TANK. Im so so drained, this is a living nightmare. I cant figure it out. Im definitely throwing parts at it cuz every mechanic i take it to knows nothing is wrong with it. The last tbing i will say is i took alook at the monitor ready while hooked up to obd2 and the EGR says system not ready, this was the case be4 and after the check engine light came on. Everytime i change a part i check for system readyness. But i didnt notic. The EGR NOT READY till yesterday? Could this becthe problem, its not throwing a code For EGR.,. ANY HEHELP WOULD BE HIGHLY APPRECIATED. ive noticed on the past 2 occations these lean n rich codes pop up at idol. Thanks again

[2010AveoLT]

what lean and Rich codes are popping up?

[Kevin_Fenstermacher]

P0172to rich in general?
P0171 to lean in general?
P2187 at idle to lean
P2188at idle to rich

[AstronautTurtle]

You may have to reflash the ecu. A GM service center should be able to do it on the cheap.

[Kevin_Fenstermacher]

Evap purge 0.0 %
Abslt tps 15.2%
Engin rpm [ freeze frame] 777
Barometric pressure 99kpa
Calc load 35.2%
Map sense 41 kpa
Collant 161 degrees °F
Iat 57 °F
Ign advance 0.0 degrees
St fuel trm 0.7
Long term fuel trm . 0.7
Vehicle speed 0mph
Absolute load 29.0%
Fuel system 1 closed
Fuel sys 2 n/a
Rel tps 5.0
Throttle cmd 6.6
Abs tps B 14.9
Acc pos D 10.5
Acc pos E 5.0
Evap purge 0.0
Cmd eq ratio 0.999
02 s11 0.130 (v)
St ftrm 11 0.7
O2s12 0.720(v)
Syftrm12 99.2
CLR DIST 101 (MI)
FUEL LEVEL 30.9
VPWR 14.606 (V)

[Kevin_Fenstermacher]

Hope this help with anything you guys can see in the freeze frame

[AstronautTurtle]

Try clearing the codes when the engine is running and at normal operating temperature. If it comes back, you can try to run seafoam or a bottle of techron concentrate through the gas tank. Just put it in when your almost empty then fill the tank up completely. If the problem persists after that then, as stated previously, you may need to reflash the ECU.