I have a 2005 Echo.It was recently serviced,full inspection.When I picked it up the check engine light was on.They checked it with the computer but no code was identified.the light went off.30 seconds later when i restarted the car it came on again.The service provider checked it with the computer and,again,no code(s) were identified.Took it home.The light disappeared again for a couple of days and is now on again.Can you help?
Computer analysis is not showing any code X2
Hello. Welcome to Just Answer. Please allow me to assist you on your concern. Question: Who checked for codes?
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Not a Toyot dealer tech?
No.He called toyota but did not get a response.
More often than not, Toyota computers "remember" if the check engine light was on, and then goes out. THis is called Code History, or, if a code is about to be set, it is called a "pending code". If your mechanic cannot extract code history or pending codes, he is never going to be able to rectify your situation.
It all depends on how sophisticated his code reader is.
Codes that come and go, sometimes, are caused by the seal on the fuel cap. If it is a bit loose, the light may come on.
Without the codes, I cannot tell you if the cap o-ring needs attention or not. A little vaseline on the o-ring can't hurt.
He is questioning ECM?
Electronic control module
That is a rare failure. I would not bet money that the ECM is bad.
Okay.I will try the fuel cap.
Can I get back to you if I exit?
The better choice here would be having the vehicle scanned with somebody with a better scanner; one that can check pending codes
Yes, you can get back to me here. Post in when you have an update, the system will alert me. I will get back to you as quick as I can
ok Thank you.
No worries. Glad to help.
Brought car to toyota tech.They were unable to determine what the problem was as the light had gone off again by the time they saw it.They thought it could be a glitch in the second oxygen sensor.Said to leave it as is and come back if it presents again.I did use petroleum jelly on the o ring for the gas tank.The light did not go out right away.I took the cap off a couple of times during the day.The next morning(when I was going to Toyota) I started the car the engine light gone.
Thank you for your assistance
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