PO172, PO175
Thread Starter
Junior Member
Joined: Oct 2019
Posts: 23
Likes: 1
From: Houston Texas
2006 350 ML
PO172, PO175
Hello, need help again please! 2006 350 ML 3.5 V6, 4 matic, 272.967
113,523 miles. Scanner is Snap On, Modis Ultra.
changed fuel pump and on deceleration skips a bit.
Any ideas? Thank you!!!
113,523 miles. Scanner is Snap On, Modis Ultra.
changed fuel pump and on deceleration skips a bit.
Any ideas? Thank you!!!
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
These two codes refer to too much/too little gas or too much air/too little air being delivered to both banks.
80% of the time it is an air delivery problem. Remove the air filters and hold them up to the sun. If you do not see the sun coming through the filter/s, they must be replaced.
If the filters are not the problem, check to see that there are no vacuum hoses that are cracked or broken. Then when reinstalling the air filter housing make sure that the rubber tube is fitted correctly to the Throttle Valve Actuator.
Only use the last two PDFs.
80% of the time it is an air delivery problem. Remove the air filters and hold them up to the sun. If you do not see the sun coming through the filter/s, they must be replaced.
If the filters are not the problem, check to see that there are no vacuum hoses that are cracked or broken. Then when reinstalling the air filter housing make sure that the rubber tube is fitted correctly to the Throttle Valve Actuator.
Only use the last two PDFs.
Last edited by Maj. Dundee; Nov 29, 2019 at 02:09 AM.
