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Communities > Diagnostics > USA Cars > C1239 Emission Test Roll active
C1239 Emission Test Roll active

279 Views 3 Replies Latest reply: 2023-10-17 20:12:56


  •   Level 2   
    (11) points
    Victor Ramos
    2023-10-17 03:34:32
    Have 05 Jeep Grand Cherokee. I was looking to see if I can run a test of the EVAP system and activate the emission roll test. Now the "Brake and ABS light are on with C1239 emission roll test active and I can not delete the with the my MP808TS.
    Now got stock in the PCM and not let me do anything else in the car.
    What can I do in this case?

  •   Level 9   
    (3573) points

    2023-10-17 13:03:08 (Reply to:Victor Ramos)

    Hi,check for a faulty left rear speed sensor, or rear rotor check for correct sensor
    installation and check for a maybe faulty skid control ecu( brake actuator assembly).
    Also do a deep reset on the system.

  •   Level 2   
    (11) points
    Victor Ramos
    2023-10-17 18:23:46 (Reply to:)
     Yesterday night I decided to disconnect the battery and the ABS plug and let it seat overnight. Today I reconnected the ABS and the battery and the Brake and ABS light are gone. 

  •   Level 9   
    (3573) points

    2023-10-17 20:12:56 (Reply to:Victor Ramos)

    Hi,good this was successfully, I knew this should work. In some cases you do not
    need a scanner ,but only experience. This from penders USA cars holland.
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