Po172 2022 honda accord s 1.5L | The Car Community | Page 1

safe nebula Jun 20, 2025, 12:47 PM

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I had this code pop up and I took it to a mechanic he charged me 1500 for fuel injectors I thought it was fixed now it popped up again it only happens when on the interstate going 75-80 not at city speeds I’m coming here because the shop I went to only has a 30 day warranty for labor the fuel injectors are ok I went to a different shop for another diagnostic.
The shop I got it verified at is 2 months out is there anything I could try to fix?

I’m decent with changing sensors I don’t want to personally mess with engine/ transmission

empty night Jun 20, 2025, 12:58 PM

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2022? Is it already out of warranty?

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The bad news is - this is not likely a code you are replacing a sensor on. It’s indicating the engine is running rich, which could be caused by a whole slew of different things; so you’re in for a bit of diagnosis. Do you have a multimeter, and do you have a code reader that can show fuel trims and air/fuel ratios?

safe nebula Jun 20, 2025, 9:53 PM

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I do have a meter and I can get a reader if needed

summer parrotBOT Jun 20, 2025, 9:53 PM

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GG @safe nebula, you just advanced to level 1! Chat more to level up and earn top roles!

safe nebula Jun 20, 2025, 9:53 PM

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Yea I already have 70k miles on the car

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Im replacing the spark plugs and the front o2 sensor today

empty night Jun 21, 2025, 12:12 AM

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Cool! Thats a good start. After replacing that stuff, clear the code and see if it comes back. If it does, scope out your LTFT and let us know what numbers you see please.

safe nebula Jun 21, 2025, 6:48 PM

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Alright I will

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I shouldent know until the 8th I don’t think I’m going on a hwy until then.

safe nebula Jul 4, 2025, 12:20 AM

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That’s the old laf sensor

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Im going to see if the error pops up now that its changed im driving 1100 miles next week

safe nebula Jul 6, 2025, 5:14 AM

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empty night Jul 6, 2025, 11:16 AM

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Ok those fuel trims are way low, which tells us the computer is removing way more fuel than it should be, in an attempt to lean out the mixture for correct air fuel ratio. You’re at -20% and you want to be -10% to 10%. I can see this out in the MAF reading, converting 4.64 lbs per minute to 35 grams per second. Following the rule of thumb that 1 g/s for every liter of displacement for every 500 rpm, at 2100 rpm if I’m seeing correctly, I’d expect 1.5 g/s times 4, or about 6 g/s.

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empty night Jul 6, 2025, 11:18 AM

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safe nebula

Can you see what this number is at idle please, with the engine warmed up, and what RPM it is idling?

safe nebula Jul 6, 2025, 3:27 PM

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You think replacing the mass air flow sensor fill fix it ? I already swapped laf (air fuel) which is in bay 1 sensor 1 of my o2 sensors

empty night Jul 6, 2025, 5:25 PM

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Ok thats at idle, that works out to 3 grams per second. Expecting 1.5 grams per second for every 500 RPMs, it’s close but a smidge high. I’m hesitant to suggest a MAF replacement based on this info, but one more test: what do you get at 3000 rpms? Based on the math above, I’d expect 9 grams per second or around 1.2lbs/second

safe nebula Jul 10, 2025, 6:50 PM

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summer parrotBOT Jul 10, 2025, 6:50 PM

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GG @safe nebula, you just advanced to level 2! Chat more to level up and earn top roles!

empty night Jul 10, 2025, 8:14 PM

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Yeah those readings look a little out of spec to my eyes. I’m thinking MAF replacement unless someone else chimes in with something I’m missing

#Po172 2022 honda accord s 1.5L