Last week, I had a yellow Check Engine light that came up in my dash. I decided it was the right time to *finally* buy the FCX-II tool (Peake Research) to diagnose this code. What I didn't expect was that the error codes were so confusing haha!
So... if someone can help me a bit with this one, I'll appreciate it a lot
The codes are :
07 (Table 07, not an error code)
50 (Secondary air control)
3E (Misfire Detected random or unknown cylinder)
33 (Misfire detected cylinder 2)
-- (End of error codes)
Is this as simple as a bad spark plug ? What is secondary air control ( i though it was Oxygen Sensor but O2 Sensor has it's own code in Table 7).
Maybe it can help you to know that...
I got a 1998, 318i, M44 engine.
Running on Syntec oil and 91 octane gas.
Spark plugs were changed approx. 1 year ago.
O2 Sensor were never replaced since I get the car on august 2004.
All filters (gas, oil of course, air, cabin) are replaced regulary.
Last time I got a yellow Check Engine, I disconnected the battery to see if the light would light again and no, it didn't for 4 months (since last week).
Help is really appreciated
I'm kinda broke right now and don't really want to go to dealership to diagnose this, if it's really simple to repair.