Question about 2002 Toyota ECHO
I had same problem .. the echo depends on a good seal for the gas cap .. it draws a slight vacuum (or maybe pressure) to test the seal .. if it cant develop the vacuum then it sets the alarm light .... in my case a small crack in the rubber seal of the gas cap caused the problem .. a new gas cap resolved it .. it takes a while to clear the code .. maybe a few starts .. its also a good idea to clean up the mouth of the gas filler tube ..if its rusty or dirty then you cant get a good seal .. wd40 does a nice job of cleaning .. the new gas cap was only a few dollars at advanced auto but lacks the teather strap
the diagnostic scan at autozone does not narrow it down .. it just indicates something like "faulty polution control device" .. or maybe it was an even more generic term .. cant remember ..but not much help ..
in other cars (caravan) the oxygen sensor frequently seems to be the cause of the alarm.. .. the scanner does flag that ..
Posted on Jul 02, 2009
If what you mean is the "Service Engine Soon", or the equivalent light is on, this could be one or several of many types of failures. A properly equipped service center (dealer is usually best), would connect a diagnostics computer using the manufacture model software and run a diagnostics sequence or equivalent.
The computer will display the service code sets. In reference to the service manual the defective areas can be determined, and the necessary parts can be changed.
In the average automobile there are about 20 common faults that can cause the vehicle's service engine soon indicator to turn illuminate.
Posted on Jun 30, 2009
Take it to autozone and let them scan the code and lemme know what it is.
Posted on Jun 30, 2009
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Posted on Jan 02, 2017
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