Code CO290 (1/5 current)

Tiny
DAVE KVALHEIM
  • MEMBER
  • 2002 CADILLAC ESCALADE
  • V8
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
Class 2 data link malfunction.
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Thursday, May 14th, 2020 AT 5:53 PM

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Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Basically this code is telling you that the EBCM (electronic brake control) failed to receive the serial data message from the PCM.

Usually this is not the only code that you have. Do you have a scan tool capable of communicating with the ABS/EBCM? If so, can you communicate with it?

If not, do you have any issues with the vehicle? Is the ABS light on or any other warning lights?

Thanks
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Thursday, May 14th, 2020 AT 6:17 PM
Tiny
DAVE KVALHEIM
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Waiting for further analysis with new information.
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Saturday, May 16th, 2020 AT 12:13 PM
Tiny
DAVE KVALHEIM
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  • 4 POSTS
IMG_8974. Jpeg
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Saturday, May 16th, 2020 AT 12:19 PM
Tiny
DAVE KVALHEIM
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  • 4 POSTS
Co286(3/5) history. Abs shorted to battery co269(4/5) excessive dump time. Co298(5/5)history.
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Saturday, May 16th, 2020 AT 12:28 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
C0286 - MPA malfunction
C0269 - EBCM Commands dump solenoid on for 9 seconds
P0298 - Torque signal malfunction

I attached the testing for these codes as well. Run through these tests and we can go from there. Thanks
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Saturday, May 16th, 2020 AT 7:59 PM

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