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  1. Plum Crazy

    P21B2 code

    How do you know what the computer has commanded? How do you determine what position the EGR valve is in?
  2. Plum Crazy

    P21B2 code

    Thank you for sharing this information. I just cleaned the EGR and cooler. Changed the coolant at the same time. Cross over tube looked fine. I guess it is either the O2 sensor, module, or the NOX absorber.
  3. Plum Crazy

    P21B2 code

    Done, Thank you
  4. Plum Crazy

    NOX Sensor

    What was the code?
  5. Plum Crazy

    NOX Sensor

    Did you have any codes come up? If so what were the codes?
  6. Plum Crazy

    P21B2 code

    I keep getting a code P21B2 code. It’s a Nox closed loop excessive time description. Has anyone experienced this before? Got it resolved? How?
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