Toyota Tundra Forum : “Check Engine Light”

The light corelates to something... Call around to dealers first.. Alot more dealers will check free these days and the dealer has the right tools and training.. Second way is parts houses.. Many of the Autozones, Napa, etc will check codes for free.. They will give you the code and what it means.. But understand the code alone may not be the cause.. meaning might say Oxygen Sensor code but it might not need a sensor.. There is a long diagnosis tree that much be followed to try and isolate the cause.. Could be a sensor but could be other stuff giving the sensor readings that are out of the paramenters causing the lite to come on.. Depending on your states inspection rules may have to get fixed before passes inspection.. Goodluck..

Thanks Chris.  You rock.

Make sure you put the cap on so that it goes past the first click... I do this on my 07 Tundra and no check light.  :)

go to any autozone and they'll run codes for free.  Other wise chech the manual.  I know on older models you could jumper the diognostic box under the hood.  I'm not sure Tundras have that.   Personally I went to harbor frieght and bought a cheep code reader.