Check engine light comes and goes at random on 2006 Hummer H3

Check engine light comes on for a short time and goes off. This happens at random.

by in Oceanside, CA on May 18, 2010
1 answer
ANSWER by on March 17, 2011
Had that same problem and now it finally came on all the time. I am told it is my Coolant Temp Sensor. I was told to check my Coolant levels because that could cause the problem.