"Increased Emissions!" error
#11
Contributors
Join Date: Jul 2010
Location: socal
Posts: 1,727
Likes: 0
Received 2 Likes
on
2 Posts
My Ride: 545I and a half dozen other rides
![Default](https://5series.net/forums/images/icons/icon1.gif)
There a couple ways of repairing this....
- Go online and ask what it 'could be' and replace those parts you decide is the issue (blind luck) hoping it will fix the problem.
- Go to the dealer, have them diagnose it, and maybe afterwards have it fixed.
- Go have a independent , have them diagnose it, and maybe afterwards have it fixed.
- Go to have the code read and ask the question again here hoping you at least have a better direction.
- Have the code read and research (online and otherwise) and perform the correct repairs yourself.
- Ignore the problem and hope it goes away
#12
Members
Thread Starter
Join Date: May 2012
Location: Atlanta
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://5series.net/forums/images/icons/icon1.gif)
There a couple ways of repairing this....
- Go online and ask what it 'could be' and replace those parts you decide is the issue (blind luck) hoping it will fix the problem.
- Go to the dealer, have them diagnose it, and maybe afterwards have it fixed.
- Go have a independent , have them diagnose it, and maybe afterwards have it fixed.
- Go to have the code read and ask the question again here hoping you at least have a better direction.
- Have the code read and research (online and otherwise) and perform the correct repairs yourself.
- Ignore the problem and hope it goes away
#14
Members
Thread Starter
Join Date: May 2012
Location: Atlanta
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://5series.net/forums/images/icons/icon1.gif)
finally got the codes :
"System too lean bank 1 and bank 2"
PO174 PO171
any ideas? the mechanic said something about a mass sensor but they would need to do a full test for $90
"System too lean bank 1 and bank 2"
PO174 PO171
any ideas? the mechanic said something about a mass sensor but they would need to do a full test for $90
#15
Contributors
Join Date: Jan 2009
Location: Sin City
Posts: 948
Likes: 0
Received 1 Like
on
1 Post
My Ride: Jet Black '05 545i, Sport/Premium Pkg, Steptronic, Adaptive Xenon, Nav, L7, Blue2th, PDC,
![Default](https://5series.net/forums/images/icons/icon1.gif)
Try cleaning your MAF (mass airflow sensor) located just after the air filter. You'll see a plug that goes into the tube. Clean it with a MAF cleaner from your local autoparts store. Really simple to do and report back. Good luck
#16
Members
Thread Starter
Join Date: May 2012
Location: Atlanta
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://5series.net/forums/images/icons/icon1.gif)
Took it to a local indie shop. They did not see any obvious vacuum leaks from a visual inspection. They tried replacing the MAF sensor but levels were still off. They put my old sensor back and did a smoke test and found a rotten/disintegrated lower breather hose from crankcase vent valve to oil dipstick tube. They didn't see it initially because of outer woven hose sleeve looked fine.
Diagnostics labor cost: $120
Replace hose (parts + labor) : $122
Diagnostics labor cost: $120
Replace hose (parts + labor) : $122
Thread
Thread Starter
Forum
Replies
Last Post
umnitza
Vendor Classifieds
1
09-02-2015 11:28 AM