Lexus Troubleshooting Questions? Ask a Lexus Expert
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the Check Engine and Trac lights will come on when a fault code is stored
this can be set by a large number of sensors and outputs for the computer
you need to have the code read to determine the cause.
parts stores like Autozone will read your codes for free.
have them read your code right it down and ask them to clear the code to see if it comes right back.
once you get the fault code we can better determine the cause
let me know if you need more help
a vacuum line coming loose can set a code
you could always check to make sure there are no vacuum hose problems before you go get the code checked
you can go get the code checked and come back and give it to me.
I will help you with the code
when can you get it done?
other parts stores may also do it . I just know autozone for sure so if you have a national chain closer to you give them a call and ask if they read codes or not
once you get the code you can come back and post it here.
you should find links back to your question in your email box
these multiple misfire codes can be caused by anyone of the ignition coils
it would be very helpfull if you had the full list of codes
I can tell you the most likely cause is one of your coils but I would think one of the codes was for a coil that would point you at the proper coil to change.
the vsc and trac off would come on because of the engine code it is a normal occurance.
it seems the people who sold you the car knew of the troubles and cleared the codes
did they clear the codes at the parts store? the full list would really help me to help you
at this point it sounds like an ignition coil but without the full list of codes I could not speculate which one it is
one bad coil can cause multiple misfire codes as you have
the coils will not be covered under waranty (3) ignition system concern
how does the vehicle run? if it was related to the fuel system it would be barely drivable.
it sounds to me like you have one bad coil causing all these misfire codes
it is not uncommon for the bad coil to cause the computer to set multiple misfire codes.
please get the full list of codes so I can help you further
yes it is one per cylinder
one bad coil can cause the computer to set multiple misfire codes.
if the engine is not stumbling noticeably it is safe to drive
if you pop the hood and the engine is shaking or jumping it could cause damage to the catalytic converter because of the unburnt fuel
does the idle remain smooth? do you feel an ordinary shake? at idle or when stepping on the gas? if not it is safe to drive.
let me know when you get the list again
sorry to make you go back but this is important to the diagnosis
the thing is it's an intermitant problem and the problem probaly occurred when the RPM dropped
if the codes are cleared it will stay out until the problem happens again
this is an indication of an intermitant problem which makes it even more safe to drive
see this is why I needed the codes
the last one does not indicate a reset it indicated the problem is with the #4 coil as I had mentioned. the parts store guys are good for reading the codes for free but don't know much about the definitions
some techs like to verify this by swapping it with another one of the coils to see if the code changes position.. the p0354 indicates coil on cylinder #4 is causing the problems and also would cause all these codes
I would recommend replacing the #4 coil and having Autozone clear the codes
click here for more information on a #4 coil causing this problem
the suggested retail price on the coil is 85 dollars
the labor however is 2.6 hours which would cost 260 at a shop
this requires the removal of the upper intake
click here to view the procedure
Electrical parts can fail at any time it is really hard to predict there life span
ignition coils do go bad on many of the newer vehicles it is not uncommon
I would not let it worry you.. but you just never know when a coil might fail
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Enjoy the weekend