P0172 Code- Help Please
01-16-2019, 01:03 PM
#122
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Join Date: 09-07-2008
Location: Mebane, NC
Posts: 1,016
Watch this video may help. https://www.youtube.com/watch?v=Xh8BakUDSdc
In any event I believe you need to get a scanner hooked up and watch whats going on.
In any event I believe you need to get a scanner hooked up and watch whats going on.
01-16-2019, 01:18 PM
#124
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Join Date: 09-07-2008
Location: Mebane, NC
Posts: 1,016
He has some very good videos. I've seen a couple of other instances where the calculated alcohol content wasn't correct. You will see it in the trims for sure, the key is to find out what it thinks the content is.
01-16-2019, 02:12 PM
#125
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Join Date: 08-03-2010
Location: Lake Ronkonkoma, N.Y.
Posts: 3,564
There are two things I see these videos, looking at fuel trims (short term) and alcohol percentage. In the first video an update to the injector codes will get the fuel trim back into a normal range along with correcting for the gas used..
The second to me it showing a rich condition where again short fuel trim is monitored and again content of alcohol percentage measured.
Not having trim codes or a way to reset fuel (alcohol) is a problem.
Having a good tool can help a lot.
Going to a "smart" dealer is a crapshoot.
The second to me it showing a rich condition where again short fuel trim is monitored and again content of alcohol percentage measured.
Not having trim codes or a way to reset fuel (alcohol) is a problem.
Having a good tool can help a lot.
Going to a "smart" dealer is a crapshoot.
01-16-2019, 02:22 PM
#126
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Thread Starter
Join Date: 12-10-2010
Location: Collinsville, IL
Posts: 128
Got a buddy with a Matco Maxme that I'm borrowing this weekend. Should get me a bit more info.
I wanted to double check the coolant temp sensor readout, and possibly clean the throttle body. I noticed there isn't an IAC like on most other vehicles I'm familiar with, so I'm assumign that's incorporated into the throttle body's electronic control.
I wanted to double check the coolant temp sensor readout, and possibly clean the throttle body. I noticed there isn't an IAC like on most other vehicles I'm familiar with, so I'm assumign that's incorporated into the throttle body's electronic control.
01-16-2019, 02:35 PM
#127
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Join Date: 09-07-2008
Location: Mebane, NC
Posts: 1,016
The Matco will do it. With DBW engines there is no IAC. ECM controlling the opening of the TB does the same thing. You will see the opening voltage/percent of the TPS change when ECM is adjusting idle speed. Cleaning TB would help if the blades were not closing completely, the fact that you are applying gas pedal input points to something else.. I believe.
01-16-2019, 02:59 PM
#128
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Join Date: 08-03-2010
Location: Lake Ronkonkoma, N.Y.
Posts: 3,564
cturboaddict fill us in.
This is a good one.
No checking grounds or battery lobotomy on this one.
Last edited by Cat Man HHR; 01-17-2019 at 05:43 AM.
01-17-2019, 06:42 AM
#130
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Thread Starter
Join Date: 12-10-2010
Location: Collinsville, IL
Posts: 128
