2000 Toyota Echo 4 cyl Two Wheel Drive Automatic 85000 miles
MIL light came up. Drow it to delearship at 7:10AM, they tested at 7:22AM and told ECU is dead and needs replacement for $1250. The car trade in runs from $3.5 to $4k. See attached printouts from their diag system.
1. About 2 y ago, MIL came up -> replaced air (oxygen) sensor for $450.
2. About 6 m ago, MIL came up -> drow to the very same dealership, was told MIL poped up mistakenly but they informed the code was catalytic converter.
3. Made regular 75k tuneup with new tires about a two months ago, complained car was slow to accelerate. They said it was ok.
4. Used STP commercial cleaner for injectors about a month ago to remove deposits mixing with required amount of gas.
The question I have, there are many items to check for this Code that are listed on some sites on the internet. Why they have not done that? Can the diag tests they performed address those so no additional checking is necessary.
For example one site lists this as cause for P0300:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer is listed last. Can they bypass all other tests or can they read their results by diag equipment or can they do them in 12 minutes?
Do I need second opinion?
I know how to reset MIL and trade-in but am not condering this as an alternative.
Tuesday, December 11th, 2007 AT 2:10 PM