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Codes P0112, P1425 and P1472

Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
This is really starting to get frustrating. I have my own obd2 code reader and it keeps popping up the same codes even after replacing everything that was previously listed. I am about to ghost ride this car off a cliff.
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Sunday, April 11th, 2021 AT 10:04 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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My friend, I completely understand. They can be totally frustrating. Do me a favor. Let me know if it is all the original codes. I will try to get you diagnostics for each individual code. Also, let me know the production date of the vehicle. It should be on a label either on the driver's door or door frame.

Joe
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Monday, April 12th, 2021 AT 6:27 PM
Tiny
ADAM COWSERT
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  • 41 POSTS
Okay, here are all the codes: p0102, p0112, p0134, p0135, p0141, p1425 and a p1472. Now I have replaced both o2 sensors, the mass air flow sensor and I think the IAC valve, the fuel filter, the evap canister valve and it still wont turn off the check engine light and it hesitates when im pressing the accelerator.
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Monday, April 12th, 2021 AT 10:44 PM
Tiny
ADAM COWSERT
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  • 41 POSTS
I haven't looked for the manufacturing date yet.
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Monday, April 12th, 2021 AT 10:45 PM
Tiny
ADAM COWSERT
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  • 41 POSTS
Also how to fix each of the problems would be good.
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Monday, April 12th, 2021 AT 10:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

I think we need to focus on one at a time. If we try to hit all of them, we'll go crazy. So, let's start with the P0102 (mass air flow) code.

If you are certain there are no engine vacuum leaks, follow the directions specific to this in the attachments. The flow chart should point you in the right direction.

Note: I selected the diagnostics to be done with a basic scan tool. If you have access to VAG codes, let me know what they are. I can narrow it down further.

I picked the MAF first simply I feel that if it is fixed, other codes may go away. I realize you replaced the sensor, but there has to be a wiring issue. Following the directions below, you will be confirming power and ground to the maf. I suspect you will find a ground issue.

Let me know what you find.

Joe

See pics below.
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Tuesday, April 13th, 2021 AT 6:05 PM
Tiny
ADAM COWSERT
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  • 41 POSTS
Okay, I have all these codes still popping up, I have a book that tells me what the codes are but I need help on telling me how to fix them.
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Friday, April 23rd, 2021 AT 11:41 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

If you look at the attachments in my last post, it provides the diagnostics for the MAF issue. I picked that one because I have a feeling if that is fixed, other codes will go away. At least that is what I suspect. We need to do one at a time.

Let me know if you have questions or if there is any other way I can help.

Take care,

Joe
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Saturday, April 24th, 2021 AT 6:56 PM
Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
Okay, if the fuse in slot 43 was taken out that would probably make the check engine light come on, huh?
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Sunday, April 25th, 2021 AT 12:52 PM
Tiny
JACOBANDNICKOLAS
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Hi,

If you remove fuse 43, it shouldn't run. That powers different engine controls. So, yes, it should turn the check engine light on. It will stop the fuel pump, and power to the fuel injectors.

I attached a pic of the schematic showing the fuse.

Let me know.

Joe
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Sunday, April 25th, 2021 AT 6:31 PM
Tiny
ADAM COWSERT
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  • 41 POSTS
When I got the car that fuse was not in there, but the car still ran.
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Sunday, April 25th, 2021 AT 7:42 PM
Tiny
JACOBANDNICKOLAS
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Then someone must have done something to power that circuit. It powers the fuel pump, injectors, and so on. Does it look like the empty fuse slot was ever used?

Joe
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Sunday, April 25th, 2021 AT 9:22 PM
Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
Yeah, it looks like its been used and in my book it says its for the ECM, so I put in a fuse and it seemed to be working better but when I went to take it for a test drive the check engine light came back on and it was flashing at me and it felt like there was nothing in the gas pedal so I brought it back home, then I hooked my scanner back up and now it said that I had a misfire in cylinder one. So I went and got a spark plug and then I took the fuse back out and drove it a little bit but it was still hesitating.
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Monday, April 26th, 2021 AT 5:49 PM
Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
And now that i'm back at home I put the fuse back in and it seems to idle fine and even when I push the gas it seems alright. I haven't yet tried driving it down the road.
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Monday, April 26th, 2021 AT 5:53 PM
Tiny
JACOBANDNICKOLAS
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Hi,

Let me know how it runs when you get to drive it tomorrow. I'm interested in knowing. Also, make sure you have the correct amperage fuse in it.

Joe
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Monday, April 26th, 2021 AT 8:45 PM
Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
Actually, it was hella weird, I took it for a drive earlier and everything seemed to be alright and plus my check engine light is off but knowing my luck it will be back on tomorrow.
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Monday, April 26th, 2021 AT 11:05 PM
Tiny
JACOBANDNICKOLAS
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That is interesting. Let's hope the light stays off. Let me know if things change.

Joe
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Tuesday, April 27th, 2021 AT 6:37 PM
Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
Well, after driving it a bit today the check engine light came back on and after hooking it up to my reader it says the air intake temperature sensor has low voltage.
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Tuesday, April 27th, 2021 AT 8:40 PM
Tiny
JACOBANDNICKOLAS
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Are all connections good, clean, and not corroded?

Joe
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Tuesday, April 27th, 2021 AT 9:19 PM
Tiny
ADAM COWSERT
  • MEMBER
  • 41 POSTS
Well, I don't know where that sensor is, if it's the one right next to the mass air flow sensor then yeah it looks like its brand new with no corrosion.
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Tuesday, April 27th, 2021 AT 9:26 PM

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