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p0171 code


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jeremy1
New User

Sep 4, 2013, 10:56 AM

Post #1 of 9 (1148 views)
p0171 code Sign In

i have a 02 dodge grand caravan 3.8L im getting a 0171 trouble code #1 bank running lean. i dont realy notice a diffrecne in the way it runs in till i turn on the ac
then surges and hesitate but mostly at idel


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 4, 2013, 11:32 AM

Post #2 of 9 (1136 views)
Re: p0171 code Sign In

Check it very carefully for any vacuum leaks.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



jeremy1
New User

Sep 5, 2013, 5:43 AM

Post #3 of 9 (1112 views)
Re: p0171 code Sign In

ya could not find any leakes could it be the massair flow
sensor? i blow smoke throu brake boost line and it only came out by air fillter!

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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 5, 2013, 7:05 AM

Post #4 of 9 (1110 views)
Re: p0171 code Sign In

You've been watching too many Scotty Kilmer videos.

Test the 0/2 to determine if it is capable of going rich.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
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Tom Greenleaf profile image

Sep 5, 2013, 7:21 AM

Post #5 of 9 (1108 views)
Re: p0171 code Sign In

Has its dangers but carb cleaner targeting a possible leak should change the idle for better or worse when you hit one or more. Cooler engine and AYOR as there's risk of fire - be ready,

T



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 5, 2013, 7:30 AM

Post #6 of 9 (1102 views)
Re: p0171 code Sign In

Your vehicle doesn't have a MAF.

If you are smoking an engine to find vacuum leaks, you have to plug the intake ducting.

You really need to find out what was going on when the lean code set. This can be done by looking at freeze frame data with an enhanced scan tool. You can also look at fuel trim data to see if you have a vacuum or fueling problem.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Hammer Time
Ultimate Carjunky / Moderator
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Sep 5, 2013, 8:13 AM

Post #7 of 9 (1096 views)
Re: p0171 code Sign In

Since it's only happening to one side of a V6 engine, I would be highly suspicious of the 0/2 sensor.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 5, 2013, 9:14 AM

Post #8 of 9 (1090 views)
Re: p0171 code Sign In

It has only one upstream O2.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 5, 2013, 9:22 AM

Post #9 of 9 (1086 views)
Re: p0171 code Sign In

Aaaaaaaaah...................... so it does.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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