CEL and OBD2 codes that appeared today - Page 2
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Thread: CEL and OBD2 codes that appeared today

  1. #11
    Driver's Ed
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    Maybe something came undone? Have you looked at all of the connections yet?
    2018 6MT diesel with 65K miles as of 5/1/19

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  3. #12
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    Quote Originally Posted by rcruze View Post
    Maybe something came undone?
    That's what I'm wondering. When you get that many codes, and they all pertain to the same thing, EGR, then that's the first place to look. Is the connector plugged in? Is there a wire pulled out of it? Is the harness damaged, as might occur if it inadvertently got re-routed near a hot spot?

    Doug

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  4. #13
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    The only thing I unplugged during my experiment was the connector the EGR actuator. After the CEL and speed limiter warning showed on the display, I shut the engine off and plugged the connector back in. It snapped right into place so it's not possible that it came undone due to there being a positive latching mechanism.

    My guess is one of the three codes that I pulled only came up recently on the day the CEL illuminated, as a random malfunction. Once I reset the codes all is doing fine so far.
    plano-doug likes this.

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  6. #14
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    CEL came on today on my way home from work. Code P2457 displayed: EGR cooling system performance. Looks like this code shows up when the temperature of EGR through the cooler is higher than expected.

    Dealership will have the car tomorrow afternoon to check it over, and I told them about the prior codes from the 4th.

  7. #15
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    Car was at dealership yesterday afternoon. After about two hours the service writer calls me back to say the initial technician looking at it was not aware it was a diesel. The diesel trained technician was swamped with work and couldn't look at it that day. The service manager agreed to reset the codes and give me the car back and we'll see if it holds on without any more errors. I'll be leaving to drive to Seattle next week so I'll have a long distance trip to see what other problems show up.

  8. #16
    2nd Gear sailurman's Avatar
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    So you are leaving from Illinois to Seattle and back with a potentially speed limiting DTC? Keep that code reader hooked up LOL and good luck!
    Rivergoer likes this.
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  9. #17
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    Quote Originally Posted by sailurman View Post
    So you are leaving from Illinois to Seattle and back with a potentially speed limiting DTC? Keep that code reader hooked up LOL and good luck!
    The speed limiting code only occurred when I physically unplugged the EGR actuator valve as an experiment. It did exactly what I expected. The subsequent CELs have not had speed limiting issues; just a "soft" CEL on the dash that I'm willing to ignore.

    And yes, I'm leaving Illinois for Grand Tetons, Yellowstone, Craters Of The Moon, Crater Lake, Mt St Helens, and then Seattle.
    TDCruze and Rivergoer like this.

  10. #18
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    Enjoy the trip.
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  11. #19
    4th Gear TDCruze's Avatar
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    Quote Originally Posted by Barry Allen View Post
    The speed limiting code only occurred when I physically unplugged the EGR actuator valve as an experiment. It did exactly what I expected. The subsequent CELs have not had speed limiting issues; just a "soft" CEL on the dash that I'm willing to ignore.

    And yes, I'm leaving Illinois for Grand Tetons, Yellowstone, Craters Of The Moon, Crater Lake, Mt St Helens, and then Seattle.
    Nice!

    I am heading to Seattle tomorrow on a road trip as well.

    Hope the drive goes well and without issue.
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  12. #20
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    Beautiful country, enjoy.

    Keep us posted on how the Cruze does.
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