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I'm posting this to see if it is a common issue. I started having a rough idle, ended up with the MIL light on (Check Engine). I took it in to my independent, the VAG error code was "cam position sensor". Johnny told me this is common and happens regularly with higher-mileage cars (mine's not one, I only have 70,000). He said it will often correct itself with an oil change, it is the right bank and isn't a huge problem.
Anyway, independent opens it up, plays with the camshaft and adjusts it, can't find anything obvious, buttons it up, drives it around, it's ok. Then I take it home and 70 miles later it happens again.
I finally got some time to play with VCDS and I sorted through several "misfire" errors. Clearing the DTCs, I ran it and checked real-time for errors, it kept coming up over and over "Mass Airflow Sensor 2 (G246) P1167 - 008 Implausible signal.
Original misfires were cylinders 12, 8, 10 7, 9, 11, "leak in air intake system".
But all that cleared, every time I ran it, I just got the Mass Airflow.
Could this be a thing? I'm no longer getting any camshaft errors.
I'm posting this to see if it is a common issue. I started having a rough idle, ended up with the MIL light on (Check Engine). I took it in to my independent, the VAG error code was "cam position sensor". Johnny told me this is common and happens regularly with higher-mileage cars (mine's not one, I only have 70,000). He said it will often correct itself with an oil change, it is the right bank and isn't a huge problem.
Anyway, independent opens it up, plays with the camshaft and adjusts it, can't find anything obvious, buttons it up, drives it around, it's ok. Then I take it home and 70 miles later it happens again.
I finally got some time to play with VCDS and I sorted through several "misfire" errors. Clearing the DTCs, I ran it and checked real-time for errors, it kept coming up over and over "Mass Airflow Sensor 2 (G246) P1167 - 008 Implausible signal.
Original misfires were cylinders 12, 8, 10 7, 9, 11, "leak in air intake system".
But all that cleared, every time I ran it, I just got the Mass Airflow.
Could this be a thing? I'm no longer getting any camshaft errors.
Following this as I am having some of the same things happen with my 07 FS... Pretty sure your air intake leak code is causing the misfires. When you clear the codes, does it just pop up on RPM and start running smooth again?
when you have maf sensor failure, car gets the symptoms you describe, cylinders get wrong amount of fuel - which in a result may be demonstrated by misfires.
this may lead to cam position sensor strange measures so thats why you got it. not always this happen if the real problem is somewhere else / not in cam sensor itself.
this is how I could conclude, which may be totally wrong, but what I would do is as below:
- if you got permanent/ all the time reoccur error on MAF sensor, I would not hesitate to replace it, or at least do some cleaning etc, if applicable.
- never looked into it, but assume this is not another "engine out" work, just take the air filter housing out and you got it.
I hope you're right. I just talked to Johnny, he said these are known to get bad contacts after a long time, it might be as easy as unplugging and plugging. If it is the MAF I'm really happy, I don't want to pull the engine for the cam (and Johnny says it's not the cam anyway, I believe him).
I reset it, then the MAF error came up, reset, it came up, it seems persistent now. Perhaps before it was intermittent?
