Just got a 05 Tahoe z71

[hectorotani]

Ok so went to a different store and another code came up po102 also my info center on dash says bout 14 mpg depending on speed, could my fuel gauge be bad?

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[hectorotani]

Under truck above transfer case I see a hose not connected is this a vent hose?

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[hectorotani]

Under truck above transfer case I see a hose not connected is this a vent hose?

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[hectorotani]

I

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[Tonyrodz]

I
View attachment 203989

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Most likely your vent for the transfer case.

 

[Tonyrodz]

Ok so went to a different store and another code came up po102 also my info center on dash says bout 14 mpg depending on speed, could my fuel gauge be bad?

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Mass airflow sensor, low voltage. Is it plugged in tight?

 

[hectorotani]

Yes to my knowledge, also I turned on truck and it fired right up then I noticed maf,was not connected,I am surprised it ran


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[Tonyrodz]

Yes to my knowledge, also I turned on truck and it fired right up then I noticed maf,was not connected,I am surprised it ran


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Plug it in and clear the code.

 

[hectorotani]

Go back to loonytune or disconnected batt?

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[Scottydoggs]

unhook the neg cable for 15 minutes or so. will reset the pcm.

everyone should own a cheap scanner, they can be found for $20 or less on ebay and amazon. well worth the few bucks.

 

[hectorotani]

Thanks!!!

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[Scottydoggs]

Thanks!!!

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you found the blue truck i was looking for lol i had three requirements when looking for mine, 04 -06 low miles had to be blue or red. a 05 red LT with 121,000 on it came up and i pounced on it, only took a year, sucks being somewhat picky.

 

[Tonyrodz]

unhook the neg cable for 15 minutes or so. will reset the pcm.

everyone should own a cheap scanner, they can be found for $20 or less on ebay and amazon. well worth the few bucks.

Harbor Freight too.

 

[iamdub]

I'm sure the trans has an issue, but you can still check the simple and cheaper stuff first: Clean the MAF. A MAF reading inaccurately can cause trans shifting issues and negatively affect fuel mileage. 14 MPG isn't terrible for your truck, especially if most of your driving is in the city.

 

[hectorotani]

I'm sure the trans has an issue, but you can still check the simple and cheaper stuff first: Clean the MAF. A MAF reading inaccurately can cause trans shifting issues and negatively affect fuel mileage. 14 MPG isn't terrible for your truck, especially if most of your driving is in the city.

The 14 mpg was stuck, after clicking on it reading is different, bad wont be hooked up till wed mor ,so stay tuned and I'll post results ,also was thinking gauge was reading bad

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[Scottydoggs]

not having the maf hooked up can cause the tranny to act funny.

so id clear the codes, and see what comes back. evap is gonna need a fix of some sort. solenoid or canister tank or a cracked line is likely the issue.

 

[hectorotani]

not having the maf hooked up can cause the tranny to act funny.

so id clear the codes, and see what comes back. evap is gonna need a fix of some sort. solenoid or canister tank or a cracked line is likely the issue.

I was underneath it earlier,I couldn't remove solenoid from hose is there a secret to unclamping

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[Scottydoggs]

im not really sure, ive not had to fix one yet myself. theres loads of you tube vids that show removal of the canister tank and solenoid. seems they like to suck up dust and clog, one of the reasons for a evap code.

 

[hectorotani]

Actually front evap solenoid looks new and bottom was unhooked like someone messed with

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[hectorotani]

Oo code clear but same maf sensor,I'm getting bout 11 miles at 45 mph, I haven't bought maf ,due to its $83 price tag lol

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