Check Engine | Multiple Codes | Help!

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by fabio, Jul 12, 2018.

  1. fabio

    fabio New Member

    Joined:
    Jul 9, 2018
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    Location:
    Tri-Cities, Wa
    Vehicle:
    2012 Prius c
    Model:
    I
    Hello guys, a week ago I sold my V6 2012 Camaro to purchase a 2012 Prius C one & I LOVE this little car. I put 20k miles on the camaro in 11 months and put 1k miles on the prius c in the first 3 days of owning it.

    About my Prius C
    Year: 2012
    Mileage: 87,000

    Issue: Check Engine light is on

    When I bought the car the check engine light wasn't showing. My guess is that the previous owner cleared the codes and knew that it would take driving it 50 or so miles for the light to come back on.

    My Troubleshooting:
    I purchased a code reader and hooked it up to the car. Code reader gave me the following codes

    P0113 (Intake Air Temperature Sensor 1 Circuit High)
    P0102 (Mass or Volume Air Flow A Circuit Low)
    P0101 (Mass or Volume Air Flow A Circuit Range/Performance)
    P0171 (System Too Lean Bank 1)

    After seeing these codes I did a bit of googling and ended up

    Cleaning the MAF (Mass Air Flow) sensor with a MAF Cleaner.
    Cleaning the Gas Cap and made sure to hear the click.

    Drove the car for about 50 miles and now the Check Engine light is on again :(

    This time however, I only have 1 code and that's
    https://www.fb.pics/img/2018/07/12/4193A05F-E86C-422A-BFBE-3C9E38F96624.jpg
    [​IMG]

    As well as 2 Pending Codes
    https://www.fb.pics/img/2018/07/12/Pending-Code-1.jpg
    [​IMG]
    https://www.fb.pics/img/2018/07/12/Pending-Code-2.jpg
    [​IMG]

    Here are the following Freaze Frames
    https://www.fb.pics/img/2018/07/12/Freaze-Frame-1.jpg
    [​IMG]
    https://www.fb.pics/img/2018/07/12/Freaze-Frame-2.jpg
    [​IMG]
    https://www.fb.pics/img/2018/07/12/Freaze-Frame-3.jpg
    [​IMG]

    Here is the I/M Readiness information
    https://www.fb.pics/img/2018/07/12/IM-Readiness.jpg
    [​IMG]

    Given this information.
    Does anyone have any suggestions as to what I should be looking for next?
    I'm thinking about replacing the MAF Senesor, but not too sure.
    Please refraim from making the obvious suggestion of taken it into the dealership. I rather pay
    one of you guys for helping me out then to rely on dealerships for thelifetime of this car.
    I want to do ALL the maintence on this car myself, as I want to drive it until the wheels fall off.
    If need be, I can upload any requested Video / Photo any mechanic might need to better understand what's going on with my new (used) Prius.

    About me:
    I'm new to OBD / Code Readers so I don't know much about the abbreviations used within them.
    I've done simple work on my previous cars such as Oil Changes, Transmission Oil change, Brake change, Stereo (Amp and Sub) Install and things of that nature.

    Any and all help is greatly appreciated.
    Thanks!
     
  2. tankyuong

    tankyuong Senior Member

    Joined:
    Nov 9, 2012
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    Location:
    Central MO
    Vehicle:
    2012 Prius c
    Model:
    II
    sounds like what you said maf sensor
     
    Raytheeagle and fabio like this.
  3. fabio

    fabio New Member

    Joined:
    Jul 9, 2018
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    Location:
    Tri-Cities, Wa
    Vehicle:
    2012 Prius c
    Model:
    I
    Thanks. It's on it's way. Hopefully this is it.

    [​IMG]
     
  4. Dxta

    Dxta Senior Member

    Joined:
    Nov 7, 2016
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    Location:
    Lagos
    Vehicle:
    2008 Prius
    Model:
    II
    1. Get the MAF sensor cleaned with electronic cleaner, or have it replaced.
    Might be the air filter is dirty, and causing the MAF sensor not to process the necessary feedbacks to the ECU.

    2. System too lean code suggests lots of things causing it. But basically, its telling you that there's a lean condition somewhere in the engine side, and the ECU is compensating for the lean conditions by pumping in more fuel to balance the fuel air ratio.

    3. Check for vacuum, intake manifold, leaks on the engine.

    4. Service your fuel injectors, and check the spark plugs also.
    Carbon buildups on the injectors and spark plugs are terrible with these cars.

    5. If all the above doesn't solve it, have a look at the fuel pump in the tank if it's supplying th right pressure.

    PS: using a gen2 picture just for an example below.

    It shows the spark plugs, and the fuel injectors removed(placed on the cowl).

    InShot_20170105_171406.jpg

    Dxta
     
  5. fabio

    fabio New Member

    Joined:
    Jul 9, 2018
    13
    6
    0
    Location:
    Tri-Cities, Wa
    Vehicle:
    2012 Prius c
    Model:
    I
    Thanks! Got the it fixed. It was just the MAF sensor and all the codes went away :). Figured I get back to the forum seeing as I hate it when there's and old post and the OP never responds back with whether or not they got it fixed.
     
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