Engine light on..then off
Thread Starter
Drifting
Joined: May 2011
Posts: 1,526
Likes: 8
From: Atlanta Ga
Engine light on..then off
During my 2 minute commute to work this morning...the engine light came on for maybe 10 seconds...then went off. Any sort of concerns...or is this quasi normal?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Intermittant light usually means that a sensor is beginning to fail. If it threw a code (it may not have), you might get a clue as to which sensor it is. Before changing it out, try removing and cleaning all electrical connectors and re-trying to see if a dirty connection is the problem.
Drifting
Joined: Apr 2008
Posts: 1,992
Likes: 56
From: Antioch IL
Intermittant light usually means that a sensor is beginning to fail. If it threw a code (it may not have), you might get a clue as to which sensor it is. Before changing it out, try removing and cleaning all electrical connectors and re-trying to see if a dirty connection is the problem.
mine did the same and i could not pull any codes off if the computer, and It has stopped doing that since I cleaned all of the connectors. Good Luck. 
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
The sensors are connected into the electrical system via mating connectors (with wiring running either direction). Pull the connectors apart. Use Q-tips, etc. and cleaner to clean crud/corrosion off the contacts (both connectors). Put a little dielectric grease on the contacts (prevents future corrosion) and stick them back together. Does that explain it?
[You might do the same on all of the ECM cable/ground connections.]
[You might do the same on all of the ECM cable/ground connections.]
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Melting Slicks
Joined: Nov 1999
Posts: 2,461
Likes: 354
From: Madison Alabama
My "Check Engine Light" came on for my DD (01 Mitsu Spyder GT with 120K miles). I had the light checked at AutoZone...02 Sensor for $80. A week later same thing, back to AZ. Another 02 Sensor...price $80. I said screw it and drove the thing with out replacing the second sensor. Light stayed on for about a year and suddenly went out. Self correcting or...maybe the light burned out. Either way, lights out and she still gets 26 MPG. I'm happy. Wouldn't do that with my Vettes though.
Thread Starter
Drifting
Joined: May 2011
Posts: 1,526
Likes: 8
From: Atlanta Ga
The sensors are connected into the electrical system via mating connectors (with wiring running either direction). Pull the connectors apart. Use Q-tips, etc. and cleaner to clean crud/corrosion off the contacts (both connectors). Put a little dielectric grease on the contacts (prevents future corrosion) and stick them back together. Does that explain it?
[You might do the same on all of the ECM cable/ground connections.]
[You might do the same on all of the ECM cable/ground connections.]
Thanks
J.
Thread Starter
Drifting
Joined: May 2011
Posts: 1,526
Likes: 8
From: Atlanta Ga
My "Check Engine Light" came on for my DD (01 Mitsu Spyder GT with 120K miles). I had the light checked at AutoZone...02 Sensor for $80. A week later same thing, back to AZ. Another 02 Sensor...price $80. I said screw it and drove the thing with out replacing the second sensor. Light stayed on for about a year and suddenly went out. Self correcting or...maybe the light burned out. Either way, lights out and she still gets 26 MPG. I'm happy. Wouldn't do that with my Vettes though.