[pessemist]

Hello all: I just purchased a mint condition 1999' 911 coupe with 100K miles on her.

After driving 200 miles I got check engine light with codes P1126, P1124 Also got the P0130* & P0150* as 'intermittent' codes. I rest them and almost exactly another 200 miles the exact same codes came back.

My research shows that this suggests the engine is running leaner than normal. But now I am not sure what to replace/fix.

I am thi9nking of the following progressive repair list (throw parts at it) until the light stays out:

ROUND #1
Replace oil cap
Replace Gas cap
Replace Mass Flow Sensor
Replace Air Filter

ROUND #2
Replace all Oxygen Sensors

ROUND #3
Replace all Spark Plugs

ROUND #4
Find a garage that is competent to do a vacuum check on the engine.


Does this sound like the right approach? All this stuff is likely due for replacement anyway. The engine is clean enough to eat off of so I know it was a garage queen and saw an easy life.

The engine itself sometimes runs rough for about 30 seconds (not always) but then settles down to a nice purr.

Thanks ahead of time for any help, advice or suggestions.

Doug