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Old 10-02-2008, 03:20 PM #1
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P1130 Air Flow Sensor
I keep getting a P1130 and P0171. I am about to attempt to relace the sensor. I say attempt because the truck has 160K and is in central NY. (RUST, LOTS OF IT). Anyone have any words of wisdom. ALSO has anyone had this problem and do you know if the AF replaced will cure this problem.
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Old 10-03-2008, 09:31 AM #2
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Spray some pb blaster on the nuts and let it sit for a few. I would also get new nuts to put back on. The sensor should come with a gasket too. I had the P0171 come up by itself the other week and cleared it after cleaning my MAF sensor. When I replaced my A/F sensor I got two different codes but can't remember what they were. I would replace the A/F and clean the MAF in your case.
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Old 10-03-2008, 01:47 PM #3
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no good
changed the MAF and the AF. New plugs and wires. Still get p1130 and p0171.
HELP!!!!!
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Old 10-03-2008, 10:36 PM #4
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When DTC P0171 is recorded, the actual air-fuel ratio is on the LEAN side. When DTC P0172 is recorded, the actual air-fuel ratio is on the RICH side.


the 0171 is caused by the o2 sensor being bad, so fixing that will solve the 0171 code, and you said you replaced both the o2 sensor and the maf... correct?
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Old 10-04-2008, 11:09 AM #5
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I replaced the MAF and the AF senor which is referred to by some as a O2 sensor. I have california emissions and have only two sensors before the two cats and after. I replaced the one before which is the AF/o2 sensor.

I havent replaced the other one cause there was nothing inidcating that malfunction.
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Old 10-04-2008, 01:49 PM #6
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Well here is the update. It turns out the ground cable that is bolted to the manifold was loose. It kept setting of the codes.
If anyone has this problem and needs to know where the ground is mounted let me know and I will post a picture.

I would like to Thank those that tried to help and the thousands who visit the website that didnt offer any advice.
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Old 10-04-2008, 07:43 PM #7
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good to hear you got it fixed!
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Old 10-05-2008, 12:56 PM #8
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Good to hear Skorpion! I would like to see a picture of the ground for future reference if you don't mind. That's a good find btw, never heard that before. . .
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Old 07-26-2010, 04:47 PM #9
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I am in syracuse and have the same issue and am about to do the same fix- where is the ground???

so I can tell my mechanic when he swaps out the rusted a/f sensor

it was running fine with 2 codes,since I have noticed the cel and had it scanned it has since began to race when I start it

PO replaced o2 rear sensor @110k miles,and MAF sensor @130k miles, now I am new to 4 runner @ 138k and the A/F code is triggered

P1130
P1133 pending
P1135

wth does pending mean ???
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Old 08-13-2016, 05:06 PM #10
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Ground wire question
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Originally Posted by skorpion View Post
Well here is the update. It turns out the ground cable that is bolted to the manifold was loose. It kept setting of the codes.
If anyone has this problem and needs to know where the ground is mounted let me know and I will post a picture.

I would like to Thank those that tried to help and the thousands who visit the website that didnt offer any advice.
Hello Scorpion, I would greatly appreciate a picture or description of the where the ground wire is located. I'm throwing the same codes and would like to check the ground wire before replacing any expensive components. Thanks much if you are able to oblige. Sincerely, sureshot
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Old 01-26-2022, 10:46 PM #11
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I know this is an old thread by now beings its from 2008 but i would really appreciate a picture of the ground location. Replaced the o2 sensors because of a different code and now its throwing this one so were trying to explore everything that could be wrong.
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Old 01-26-2022, 11:04 PM #12
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I know this is an old thread by now beings its from 2008 but i would really appreciate a picture of the ground location. Replaced the o2 sensors because of a different code and now its throwing this one so were trying to explore everything that could be wrong.
Here's an image I found when I searched for "5vz-fe manifold ground location":



I'm not really sure, but I think that bolt with all the wires attached to it near that diagnostic port is probably the one you're looking for?

EDIT: this intake manifold diagram shows that spot labelled as "ground strap":

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Last edited by cl4Rk; 01-26-2022 at 11:12 PM.
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