Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18

Thread: Has anyone seen P0458?

  1. #11
    Senior Member Top_Fuel's Avatar
    Join Date
    Feb 2016
    Location
    Ohio
    Country
    United States
    Posts
    2,993
    Thanks
    1,920
    Thanked 1,888 Times in 1,091 Posts
    You might want to start following the wiring harness back from the MAF and look for any damaged areas. If the sensor is good but the computer is still getting a bad reading from it, then it could be in the harness. Maybe you pinched a wire or something during the transmission install process. It wouldn't be the first time that's happened to someone.


        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 52.1 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)


  2. #12
    Member
    Join Date
    Feb 2020
    Location
    USA
    Country
    United States
    Posts
    62
    Thanks
    8
    Thanked 35 Times in 13 Posts
    Quote Originally Posted by Top_Fuel View Post
    You might want to start following the wiring harness back from the MAF and look for any damaged areas. If the sensor is good but the computer is still getting a bad reading from it, then it could be in the harness. Maybe you pinched a wire or something during the transmission install process. It wouldn't be the first time that's happened to someone.
    Is there a diagram I can use to test for continuity without pulling the whole harness apart? Or do the wire colors track all the way to the fuse box? I'd really prefer to avoid that if possible, and I'd hate to go through the effort of tearing the harness out if that turns out to not be the issue...

  3. #13
    Senior Member
    Join Date
    Apr 2018
    Location
    Atlanta Metro
    Country
    United States
    Posts
    594
    Thanks
    1
    Thanked 249 Times in 177 Posts
    Raven - Let me give you my $0.02 worth. Let me know if you need change back!

    • P0458 - That is related to your purge solenoid. And based on your original description, it acted like a purge solenoid problem.

    What happens when the purge solenoid fails, or doesn't work (like when it is not plugged up correctly), it lets evap system vapors enter the intake. This floods the engine and is difficult to start an engine. It will hit on the odd cylinder but won't fire until the excess vapors are cleared away. I've experienced this first hand. You might try to hold the throttle open to get plenty of air to mix with the vapors ... or at least to clear the vapors out quicker. My guess is that in some way your purge solenoid is not connected, or not connected solidly. Check that connection real good, clean it, check for bent pins. Last case is, replace that solenoid. They're generally inexpensive, in the $20 - $25 range.


    • P0113 - Is an intake air temperature sensor like others have said. My understanding is that when the temps are low, the voltage increases toward 5V, and vice-versa. My guess is it never truly gets to 5V unless there is a problem. Yours seems to have a problem. I'm going to have to continue to guess that this is a connection issue. With all the work that was just done on your car, missing a couple connections doesn't seem unusual. I'm not sure if that sensor is part of the inbox, intake manifold, or if it hanging out in front of the radiator.

        __________________________________________

        click to view fuel log View my fuel log 2020 Mirage ES 1.2 manual: 42.4 mpg (US) ... 18.0 km/L ... 5.6 L/100 km ... 50.9 mpg (Imp)


  4. #14
    Member
    Join Date
    Feb 2020
    Location
    USA
    Country
    United States
    Posts
    62
    Thanks
    8
    Thanked 35 Times in 13 Posts
    Okay, update, I have no clue what fixed it but it's running great now. I need to do a transmission flush because there was mud in it (idiots pulling the part from the salvage let it tip I guess), and the exhaust needs to be tightened down, but she's running and starting just fine. God this is a finicky car sometimes. My best guess as to why she wouldn't start is just that she was crazy, crazy flooded. I have no clue what was causing the trouble codes, but I'll update if they come back. I'll probably do two or three fluid flushes over the next day just to be sure I get as much of that crap out as I can. At least if it dies in the next 6 months from that I can get a full refund.

  5. The Following User Says Thank You to RavenMirage2015 For This Useful Post:

    Top_Fuel (04-22-2021)

  6. #15
    Moderator Eggman's Avatar
    Join Date
    Sep 2015
    Location
    Cleveland, Ohio
    Country
    United States
    Posts
    9,335
    Thanks
    3,846
    Thanked 2,493 Times in 1,889 Posts
    Sounds like an intermittent wiring fault that magically (temporarily) fixed itself. With your engine running check your wiring harness carefully gently tugging at various points and see if your engine stops running.

    Or just drive it and smile at how this car just keeps running.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.5 mpg (US) ... 21.0 km/L ... 4.8 L/100 km ... 59.4 mpg (Imp)


  7. #16
    Member
    Join Date
    Feb 2020
    Location
    USA
    Country
    United States
    Posts
    62
    Thanks
    8
    Thanked 35 Times in 13 Posts
    Quote Originally Posted by Eggman View Post
    Sounds like an intermittent wiring fault that magically (temporarily) fixed itself. With your engine running check your wiring harness carefully gently tugging at various points and see if your engine stops running.

    Or just drive it and smile at how this car just keeps running.
    Option 2 seems like the one for me lol. With how the last few days have been, I don't even want to think about working on Bloodletter more. I was going to hard install an inverter with this swap and do a brake fluid flush, but now I'm going to wait at least a week before I do those. It might come back, but that's future me's problem if so.

    Thanks for all the suggestions here, I'm not sure if any one in particular helped but I tried them all so one of them must have done something.

  8. #17
    Senior Member
    Join Date
    Oct 2016
    Location
    here
    Country
    Aaland
    Posts
    5,368
    Garage empty: add car
    Thanks
    2,246
    Thanked 2,521 Times in 1,722 Posts
    I had one that wouldn't start for a few days. I think my compression tester is hooped as it showed really low compression in 2 holes, that or the car runs alright with 2 low holes. . I figured it was toast then it started up after I left it alone for a while. It's been driven everyday now for month or so now.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)


  9. #18
    Senior Member
    Join Date
    Apr 2018
    Location
    Atlanta Metro
    Country
    United States
    Posts
    594
    Thanks
    1
    Thanked 249 Times in 177 Posts
    I think you're probably right, it was flooded big time. Good luck with it long term, probably be Ok.


        __________________________________________

        click to view fuel log View my fuel log 2020 Mirage ES 1.2 manual: 42.4 mpg (US) ... 18.0 km/L ... 5.6 L/100 km ... 50.9 mpg (Imp)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •