Oh, YEAH! We are seeing a ton of 2.5L members lately with similar codes; you might review some discussions we have been having lately with some unique 2.5L specific fixes, we have diagnosed and found the causes, repaired them, as needed.
Ok, we have been getting quite a few 2.5L troubleshooting discussions lately and they are right in line with your codes (in particular the P0171 lean code). You might review this one here:
2006 2.5 gas issues
In his case, his leak code; brought up a number of issues with vacuum leaks (PCV diaphragm bad, cylinder head had a big vacuum leak, from missing "cam plugs" that looked like freeze plugs, you normally see in a blocks water jacket). We went on to test the fuel pressure but still haven't gotten a definite test on the maf sensor.
Another thread lately, had a lean code as well; he replaced the fuel filter, then he found through testing, it ended up being a fuel pump with low pressure @ 25% under spec and a new pump solved the problem.
www.newbeetle.org
Your current codes:
wiki.ross-tech.com
049489 - No Communications with Airbag Control Module.
wiki.ross-tech.com
wiki.ross-tech.com
wiki.ross-tech.com
SO, review the two 2.5l diag threads above and they go through, the typical testing, that you should try and you may end up having similar or the same issues they have. Report back, how you want to proceed with testing and we can go from there. Thanks.
Ok, we have been getting quite a few 2.5L troubleshooting discussions lately and they are right in line with your codes (in particular the P0171 lean code). You might review this one here:
2006 2.5 gas issues
In his case, his leak code; brought up a number of issues with vacuum leaks (PCV diaphragm bad, cylinder head had a big vacuum leak, from missing "cam plugs" that looked like freeze plugs, you normally see in a blocks water jacket). We went on to test the fuel pressure but still haven't gotten a definite test on the maf sensor.
Another thread lately, had a lean code as well; he replaced the fuel filter, then he found through testing, it ended up being a fuel pump with low pressure @ 25% under spec and a new pump solved the problem.
2008 2.5 Manual beetle P0171 Lean.
I know i'm going to need some tools but starting with what's going on. Have a P0171 too Lean, and a P0442 Evap Emission control leak. read from cheap obdII bluetooth phone reader. Not too concerned with the evap leak but would like to figure it out if possible. need to pass emissions. Took...
www.newbeetle.org
Your current codes:
16555/P0171/000369 - Ross-Tech Wiki
049489 - No Communications with Airbag Control Module.
16684/P0300/000768 - Ross-Tech Wiki
16685/P0301/000769 - Ross-Tech Wiki
18613/P2181/008577 - Ross-Tech Wiki
SO, review the two 2.5l diag threads above and they go through, the typical testing, that you should try and you may end up having similar or the same issues they have. Report back, how you want to proceed with testing and we can go from there. Thanks.
