Stupid P0171
11-14-2011, 02:56 PM
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Stupid P0171
Hi!
P0171 come on - 2000 Toyota 4Runner 39,000 miles
1) Change the air filter
2) Change fuel filter
3) Clean MAF sensor
4) Clean air system (infusion)
5) BG K44 to fuel tank
60 miles P0171 again...
Any ideas? May be replace MAF sensor to new one?
P0171 come on - 2000 Toyota 4Runner 39,000 miles
1) Change the air filter
2) Change fuel filter
3) Clean MAF sensor
4) Clean air system (infusion)
5) BG K44 to fuel tank
60 miles P0171 again...
Any ideas? May be replace MAF sensor to new one?
11-17-2011, 06:58 AM
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Yeah I'm with ya!
My CEL has been on and off for the last 40,000 miles and it's the P0171 the whole time! In addition to what you've listed, I also sealed up some small vacuum leaks in my intake system with FIPG (downstream of the MAF). And the CEL came on again!
I've tested the MAF voltage and impedance and it seems to be within FSM specs. Should I try replacing it anyway???
The good news in all this is that the truck runs like new, and still gets reasonable MPG at 17-19 on most fill ups. So I'm a little hesitant to put any money into the problem.
My CEL has been on and off for the last 40,000 miles and it's the P0171 the whole time! In addition to what you've listed, I also sealed up some small vacuum leaks in my intake system with FIPG (downstream of the MAF). And the CEL came on again!
I've tested the MAF voltage and impedance and it seems to be within FSM specs. Should I try replacing it anyway???
The good news in all this is that the truck runs like new, and still gets reasonable MPG at 17-19 on most fill ups. So I'm a little hesitant to put any money into the problem.
11-20-2011, 04:44 AM
#7
Registered User
You might also want to change where you buy fuel if you can't get the P0171 to clear.
I work at Lexus and we had a bunch of cars come it with this issue. Turns out that a fuel tanker dropped off the wrong fuel at several gas stations. It was on the news. We think it was E85 but can't be sure.
I work at Lexus and we had a bunch of cars come it with this issue. Turns out that a fuel tanker dropped off the wrong fuel at several gas stations. It was on the news. We think it was E85 but can't be sure.
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11-22-2011, 07:40 PM
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Yeah I'm with ya!
My CEL has been on and off for the last 40,000 miles and it's the P0171 the whole time! In addition to what you've listed, I also sealed up some small vacuum leaks in my intake system with FIPG (downstream of the MAF). And the CEL came on again!
I've tested the MAF voltage and impedance and it seems to be within FSM specs. Should I try replacing it anyway???
The good news in all this is that the truck runs like new, and still gets reasonable MPG at 17-19 on most fill ups. So I'm a little hesitant to put any money into the problem.
My CEL has been on and off for the last 40,000 miles and it's the P0171 the whole time! In addition to what you've listed, I also sealed up some small vacuum leaks in my intake system with FIPG (downstream of the MAF). And the CEL came on again!
I've tested the MAF voltage and impedance and it seems to be within FSM specs. Should I try replacing it anyway???
The good news in all this is that the truck runs like new, and still gets reasonable MPG at 17-19 on most fill ups. So I'm a little hesitant to put any money into the problem.
Toyota dealer's mechanic any ideas? Change the MAF anyway ?
I fuel the 91 only at the same station all the time (KingSoopers reward gasstation)
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