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Check engine light in my 1999 Lexus 300 and removed oil cap and oil looks burnt?

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  • Cars & Trucks Master
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The check engine light does not actually mean you need to check the engine. The light is warning the driver the computer has a problem with something that can affect performance or emissions. You would need to get the computer scanned for trouble codes to proceed.
Its possible what you are seeing is a dried film of oil on the surface which can be normal with age.

Posted on Apr 29, 2013

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Posted on Jan 02, 2017

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SOURCE: HAVE A CODE PO446 1999

P0446 is an evap code. Most likely, you need to change the charcoal canister vent valve (CCV) under the trunk floor. Fuel cap codes set 3 codes at once, P0440. P0441 and P0446, all at the same time.

Posted on Sep 10, 2008

farroutideas
  • 78 Answers

SOURCE: 96 lexus es 300 blinking check engine light

Hi there;

#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps
Farrout!

Posted on Mar 17, 2009

mecanica03
  • 907 Answers

SOURCE: trac off and check engine light for lexus es 300

try to reset this problem , disconnect the negative battery terminal few minutes and reconnect , start the engine

Posted on Apr 21, 2009

  • 1 Answer

SOURCE: trac off and check engine light for lexus es 300

A week ago, on my Lexus ES 300 (2001), "Check Engine" and "Trac Off" lights came on. This coincided with me filling the gas tank to the brim to round the dollar to be paid. I cleaned the gas tank cap and the tank opening. However, both lights persisted. On the same day, when I turned on the car again, there was a hesitance, a stuttering to come on. Both "Check Engine" and "Trac Off" lights were still on.

The next day, the car wouldn't come on at all. It sounded as the battery was dead. I couldn't even jump start the car. So, I got a new battery from Costco ($59) and put it in. It took 15-20 seconds of cranking to get the car started. Once it was started, the engine sounded fine and the RPM normal. The "Check Engine" light was off. However, the "Trac Off" was still on. I cleaned the gas tank cap one more time.

The next morning, when I turned the car on, there was no problems. It came on instantly as it used to be, didn't have any warning lights, and drove smoothly.

Posted on Sep 01, 2009

  • 59 Answers

SOURCE: My son's 1999 Lexus ES 300 has a code of P0420 and

a common problem is the vacuum switching valves on the charcoal canister. These are small electrical solenoids with 2 vacuum hoses going to them. When you put power and ground to them they should click. Otherwise make sure there isn't a vacuum hose disconnected by the air cleaner box.

Posted on Oct 20, 2010

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1 Answer

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This happened to me as well, just a few weeks after buying our 1999 ES300. Took it into Lexus for regular maintenance and to check this out. Apparently, if you don't replace the gas cap correctly and tight enough this can cause the 'trac off' light to come one. It will go off a little while after the cap has been replaced correctly. This also happened with my 2006 Murano, 'check engine soon' message.

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Unscrew the gas cap, wait 30 sec and screw it back on making 3 clicks/cracks. Should be ok in a day or two.

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