Techron additive causing idiot "check engine" light
Safety Car
Joined: Dec 2004
Posts: 3,738
Likes: 217
From: Arizona AZ
Originally Posted by Crocodile Dave
Has anyone ever added Techron & had the check engine light come on???
Race Director
Joined: Nov 2003
Posts: 12,346
Likes: 5
From: Mustang OK
I too have some doubt that the Techron caused the Check Engine Light (CEL) to set. A steady CEL is likely an indication of an emission control system malfunction. As someone mentioned above, check your gas cap to insure it is installed correctly and sealing properly. A flashing CEL may indicate a misfire or more serious problem. Your owner's manual should also contain more info on the CEL that you may want to review. Too, try running your car's onboard diagnostics and check for trouble codes that may give you some indication as to any problem that might cause the CEL to set:
Computer Codes and DTC Information
(NOTE: After clicking on the model year, be sure to click on READ MORE toward the bottom of the next page that appears to see all the DTCs specific to that model year.)
Good luck.
Computer Codes and DTC Information
(NOTE: After clicking on the model year, be sure to click on READ MORE toward the bottom of the next page that appears to see all the DTCs specific to that model year.)
Good luck.
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Melting Slicks
Joined: Jan 2004
Posts: 3,012
Likes: 15
From: Jensen Beach FL
I just put it in and have been running on it the past 150 miles with no issues so far. The car only has 9K miles so it's the first time I've used it on the vette. I use it every 10K miles or so on all my cars for the past 10 years with no issues.
Pro
Joined: Jul 2004
Posts: 710
Likes: 1
From: Fremont (Livin' On The Fault Line!) CA
I've never had that happen (and have never heard of it happening due to Techron 
)
I always add a bottle of Chevron Proguard (Fuel System Cleaner w/Techron) at every oil change to each of my vehicles, been doing this for many years now.
The post about the gas cap not being secure definitely sounds like a possibility
(this I HAVE experienced 
), not my Vette but on another vehicle.
)I always add a bottle of Chevron Proguard (Fuel System Cleaner w/Techron) at every oil change to each of my vehicles, been doing this for many years now.
The post about the gas cap not being secure definitely sounds like a possibility
(this I HAVE experienced ), not my Vette but on another vehicle.
Thread Starter
Instructor
Joined: Oct 2003
Posts: 130
Likes: 0
From: Sonoma Wine Country
Thanks to all for the suggestion- I did check the cap and restart with no luck. Perhaps some emissions element has burnt out because there are no other symptoms at all- running fine and nothing out of the ordinary. I did fill it up and had added techroline because I thought that was supposed to be good stuff every once in awhile to "keep the injectors clean" and all that. It aint cheap either. But then out of the blue the check engine light is on, so I was hopeful that may have been the reason. I'd like to take it out for a drive (to clear it maybe) but concerned to do that with a light on.
