Check engine light is flashing and it seems to be misfiring. Temp is normal but when I sit and let it idle for a while it gets hot and the heat blows cold. I lost gas cap recently...


Asked by Nov 24, 2017 at 02:01 PM about the 1999 Lexus ES 300

Question type: Maintenance & Repair

Check engine light  is flashing and it seems to be
misfiring. Temp is normal but when I sit and let it
idle for a while it gets hot and the heat blows cold.  
If I put it in neutral and give it gas The heat comes
back and temp goes back down to normal range. I
did recently lose my gas cap but the check engine
wasn’t on for about a week. And it comes on and
goes off frequently but the mechanic said when I
had some work done that this wasn’t a big problem.
But now it’s flashing. I can only imagine the car
means business.

2 Answers


Thanks Tom. I’m about three miles from the auto parts store and it’s really misfiring. I know it’s hard for you to guess without seeing it but you think it’s safe to travel that far? I was wondering I guess if there’s anything that’s a red flag not to drive it from the things I told you it was doing. Thanks!


They said there was an evap code which would be the gas cap. And then it was a multi cyl misfire and cyl 2 and 3 misfire (4 codes total). But it came on fast. Rather than gradual. He said it’s prob only spark plugs and wires and needs a tune up. Being the weekend, a mechanic may be tough. And to be honest, money is super tight. He said (the guy that read the codes) it’s nothing that will cause bad damage and that I shouldn’t break down. He said it will just run really rough (that’s an underestimate) and it shouldn’t break down until I get to a mechanic. That the worst that can happen is the misfiring and bad gas mileage. He also said- worst case scenario, it could be a fuel injector. He thought I’d be okay to drive it a few days as is. Thoughts?

1 people found this helpful.

Your Answer:

ES 300

Looking for a Used ES 300 in your area?

CarGurus has 596 nationwide ES 300 listings starting at $1,500.


Lexus ES 300 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Lexus GS 300
14 Great Deals out of 496 listings starting at $2,500
Used Toyota Camry
883 Great Deals out of 68,182 listings starting at $1,400
Used Honda Accord
855 Great Deals out of 83,539 listings starting at $1,000
Used Lexus RX 300
7 Great Deals out of 670 listings starting at $1,995
Used Lexus LS 400
134 listings starting at $1,977
Used Toyota Avalon
190 Great Deals out of 10,738 listings starting at $900

Used Cars for Sale

2003 Lexus ES 300 For Sale
184 listings starting at $1,500
2002 Lexus ES 300 For Sale
5 Great Deals out of 137 listings starting at $1,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.