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Old 07-10-2012, 11:36 AM
bmw-mania bmw-mania is offline
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Join Date: Feb 2011
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Mein Auto: BMW
Lambda Control 1 1222
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.)

I would look at the 02 sensor first..
disconnect the o2 sensor at the plug when the car is cold.
start the car and warm it up.
if the problem doesnt return, o2 sensor bad.
o2 sensor is bypassed until operating temperature is reached.

Then double check for vacuum leaks for the umpteenth time..

Does CEL go away when you blip the throttle?
No fuel leaks?
Is your evap system for the fuel tank breathing properly?
Are all the gaskets on the intake manifold seated proper?
Not Sure? Pull/push gently on intake manifold.. look/listen for idle RPM changes..
Idle Control Valve?
Throttle Position Sensor?

stab in the dark: engine temp sensor..
Originally Posted by cj.surr View Post
I don't have to read the username on these posts to know who wrote it.

Bmw-Mania, Ladies and Gentlemen.

Last edited by bmw-mania; 07-10-2012 at 11:41 AM.
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