2002 Chevy Tahoe check engine light

Tiny
ALBERT MCLAUGHLIN
  • MEMBER
  • 2002 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 122,672 MILES
Engine replaced with new at 85,000. Current odometer, 122,672. Since engine replaced, "check engine" light comes on after several hours of high speed Interstate driving. Once lit, stays on for hours, even overight. All gages read properly. Have called "on-star" for diagnostics. They found no problems or engine misfire. Light went out before taking car to GM service. GM ran diagnostcs test and found no problem. Have not been able to make light come "on" with local driving but it reoccurs after one or two days of long distance travel.
Do you have any suggestions for "most probable" cause.
Can you recommend an inexpensive code reader so I can read the trouble codes related to the "check engine" light and reset the trouble light.
Do you
have the same problem?
Yes
No
Wednesday, January 9th, 2008 AT 4:32 PM

1 Reply

Tiny
MASTERTECHTIM
  • MEMBER
I KNOW INSUFFICIENT EGR FLOW AT STEADY THROTTLE POSITION, LIKE DRIVING ON HIGHWAY. CAN CAUSE THIS TYPE OF PROBLEM BUT THERE SHOULD HAVE BEEN A CODE STORED AND ONSTAR SHOULD HAVE PICKED UP ON IT. ONCE THE LIGHT TURNS OFF BY ITSELF, IT IS TELLING YOU THAT THE PROBLEM NO LONGER EXISTS AND THE VEHICLE HAS PASSED THAT CIRCUITS TEST A NUMBER OF TIMES AND IT PASSED.
Was this
answer
helpful?
Yes
No
Wednesday, January 9th, 2008 AT 4:44 PM

Please login or register to post a reply.

Recommended Guides