ENGINE LIGHT ON CHECK GAS CAP LIGHT ON PUT ON NEW CAP RESET COM ENGINE LIGHT BACK ON 50 MILES LATER WHAT DOES IT NEED?
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2008 Pontiac Grand Prix Question: WHAT IS THE PROBLEM WHIH ENGINE LIGHT
Answer #1Herb Ackside October 27, 2012, 08:47Journeyman
You need to have your computer system scanned to see what codes you have stored. Then post again so we can advise.
Answer #2your.mechanic October 27, 2012, 10:16Master
the gas cap light signaled that your gas cap was loose...the engine light signals that your engine computer senses something that is not within parameters...buy a scanner or go to a shop that can scan it for you.
Answer #3PontiacGuy May 30, 2014, 20:26Rookie
Replace The "Solenoid Vent Valve" (Fairly Easy Fix), Under the Left Rear Bumper,...For the "Check Gas Cap" Problem,I Did This & It Solved the Problem!! Replace "Air Pump" & "Control check Valve" That it Flows Into !!! ~ Also, 1st Have The "Air Pump Relay" Checked For Being Defective, As This Could Be The Main Problem !!!