M37x Engine light keeps coming back on
M37x Engine light keeps coming back on
I changed my sensors bank 1 and bank 2, but engine light keeps popping back on after 5 days. Diagnostic keeps saying P0131 and P0151 .. If any suggestions please help. Thanks!
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Ilya
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Re: M37x Engine light keeps coming back on
Are you sure you replaced the right bank 1 or bank 2 sensors? There is upstream and downstream. Also, its possible you have a wiring issue but that's pretty rare.
Re: M37x Engine light keeps coming back on
That's what I told the mechanic if there's a wire loose or something he told me that he checked it and all the wires are working . Can any of the sparks plugs be bad ?
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armybrat
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Re: M37x Engine light keeps coming back on
I don't think it's spark plug related but it wouldn't hurt to change them if they have over 100k miles. I think it's more of a fuel delivery or air leak issue. Those are the A/F sensors before the cats (closest to the engine), not the O2 sensors downstream. Are those the ones you changed?
Re: M37x Engine light keeps coming back on
So when you say air leak do you mean thru the exhaust maybe needs a new gasket or something ? @ armybrat ....Another thing is I don't know if it was the upstream or down stream they changed ,but I will definitely find out cause this is getting me really upset . If I can't find out I'm just will have to take it to the stealership .....
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VStar650CL
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Re: M37x Engine light keeps coming back on
Gotcha 
ok .. will check) thank you
ok .. will check) thank youRe: M37x Engine light keeps coming back on
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Re: M37x Engine light keeps coming back on
Sorry for the blur.
Re: M37x Engine light keeps coming back on
Reach1024, did you ever find a cause for your codes? I'm also driving a 2011M37x, and those codes have popped up for me, too. I'm wondering if it's a fuel pump problem, based on what I'm reading elsewhere, but none of those sources were for our specific make and model.
Re: M37x Engine light keeps coming back on
Welp, replying to my own question for anyone searching in the future. I think I found the cause of the recurring P0130 and P0150 codes on my 2011 M37X. I was cleaning the throttle bodies the other day (controversial, I know), and I found a tear in the driver's side intake hose between the throttle body and the air filter box. I've temporarily patched it with some permanent Gorilla Tape until the replacement one comes in. I'd also recently run across a thread on the Infiniti subreddit that addressed the same problem in someone's G37x that was solved by fixing the leak in an intake hose. Will report back again if anything changes.
Re: M37x Engine light keeps coming back on
thanks for the updatemicklazy wrote: ↑Sat Mar 05, 2022 3:16 pmWelp, replying to my own question for anyone searching in the future. I think I found the cause of the recurring P0130 and P0150 codes on my 2011 M37X. I was cleaning the throttle bodies the other day (controversial, I know), and I found a tear in the driver's side intake hose between the throttle body and the air filter box. I've temporarily patched it with some permanent Gorilla Tape until the replacement one comes in. I'd also recently run across a thread on the Infiniti subreddit that addressed the same problem in someone's G37x that was solved by fixing the leak in an intake hose. Will report back again if anything changes.
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