Unable to pass 2 yr emissions test but could not complete due to 2 not ready messages - Catalyst and Evap System.
Tech said I needed to drive on the highway for approx 60 miles. Did that and went back to test center not ready messages still there. Drove for another 70 miles, mostly highway and speeds from 50-70 mph. No change the messages remained.
Tech said it was a drive cycle issue or drive pattern issue.
Been online and seen lots of suggestions for different driving and tried some -...
2003 SL55 AMG - OBD2 Not Read Messages
Tech said I needed to drive on the highway for approx 60 miles. Did that and went back to test center not ready messages still there. Drove for another 70 miles, mostly highway and speeds from 50-70 mph. No change the messages remained.
Tech said it was a drive cycle issue or drive pattern issue.
Been online and seen lots of suggestions for different driving and tried some -...
2003 SL55 AMG - OBD2 Not Read Messages
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