on/off check engine light

[e30_kid89]

its annoying........engine is running fine its just that when i am driving along, the check engine light comes on when i am applying the throttle....if i completly let off the pedal the light comes off until a apply the throttle again......code is still saying o2 sensor...i replaced it yesterday and now the check engine light is on permently and wont come off...check the code and it is still saying 1222.....

1222 Lambda Control 1 - This code is stored when the DME detects excessive deviations in the air-fuel mixture (too rich or too lean) for longer than 10 seconds. Possible causes: Fuel tank ran empty, Incorrect Fuel Pressure, Injector valve defective or coked, Engine Temperature Sensor defective, Secondary air leak, Fuel evaporation control system defective, Air Flow Meter defective and/or the combustion is being disturbed by mechanical failure (Spark plugs,, compression, intake/exhaust valves, ...etc.)


any help???

[e30_kid89]

oh and prior to this problem my e30 was running under operating temp for about 2 months cause i didnt know that it needed a new t-stat....but i got it replaced though!

[kowalski]

clean the connector plug for the o2 sensor. also, how does the throttle respond when you press the gas?

[e30_kid89]

throtte responds just fine....if my check engine light came on i would have no reson to belive anything was going wrong.....i've listened to sounds or anything odd but everything seems and sounds okay. also from replacein my old o2 sensor i've noticed the mileage gettin way better....so i kno its doin its job

[Febi Guibo]

try disonnecting the battery for like 5 minutes and then check the error code...

[e30_kid89]

^^^a friend told me to do that, to reset the ecu.....had the battery disconnected overnight and then fired her up.....the light never came on till when it was starting to warm up...

[christophbmw]

I had code 107 which is) 02 sensor control....huge nightmare. I replaced the 02 sensor, all vacum lines, cleaned the idle control module checked ECU temp sensor (this could be your prob....unplug while the engine is running and if there is no difference then replace it.), checked the fuel tank ventilation system.

It ended up being a faulty injector on the #2 cylinder. The injector wasn't leaking and fuel pressure was ok (check your fuel pressure). It had an intermintent "no cycle" (where it didnt fire). i replaced the injector and it runs perfect. If you have a scanner run activation on the injectors and listen W/ a stethescope on all 4 injectors.

hope this helped, christoph.

[Autox318is]

My apologies for bringing this one back from the dead, but I'd like to know how e30_kid89 resolved this issue. I have the same symptons that he reported. Any help would be appreciated. Thanks!

[bmwman91]

Similar symptoms here.  I get the EGO Heater code, but the problem goes away when I get off the gas.  It also seems to only be when I am at an uphill angle, oddly enough.