I found An "L" shaped rubber cap with a sponge inside on my garage floor. Since then my check eng. light has been on. Bought a new gas cap as per Auto Zone Tec. I think the error code is related to th

10

Asked by Feb 19, 2017 at 02:33 PM about the 2000 Lexus RX 300 Base AWD

Question type: Maintenance & Repair

I think the P0400 error code is related to the "L" shaped rubber cap I found on the garage floor. I can't figure out where it goes. Changing the gas cap had no effect.

3 Answers

69,475

That trouble code is for the EGR system. Nothing to do with the gas cap. Possibly a clogged or malfunctioning EGR valve. HTH. - Jim

10

This is what I found on my garage floor. It had a sponge inside. I think it might be related to the Check engine light. I can't figure out where it goes or what it is.

1 of 1 people found this helpful.
69,475

Hmmmmmmm, not exactly sure what that is. But I did some more reading on your Lexus and it seems that you don't have an EGR (Exhaust Gas Recirculation) valve. So now I'm puzzled about what that code means on your vehicle. I'll have to do some more digging! -Jim

Your Answer

RX 300

Looking for a Used RX 300 in your area?

CarGurus has 9 nationwide RX 300 listings starting at $3,900.

Postal Code:

Lexus RX 300 Experts

  • #1
    Rx300_21001
    Reputation
    1,900
  • #2
    John Orlando
    Reputation
    1,000
  • #3
    mrsvirtuous
    Reputation
    690
View All

Related Models For Sale

Used Toyota Highlander
18 Great Deals out of 592 listings starting at $3,500
Used Toyota Camry
43 Great Deals out of 1,573 listings starting at $2,400
Used Honda CR-V
52 Great Deals out of 2,658 listings starting at $1,495
Used Toyota RAV4
59 Great Deals out of 2,869 listings starting at $2,999
Used Acura MDX
46 Great Deals out of 444 listings starting at $2,888
Used Toyota 4Runner
5 Great Deals out of 410 listings starting at $5,995
Used Lexus ES 300
5 listings starting at $4,995
Used BMW X5
32 Great Deals out of 732 listings starting at $3,200
Used Lexus GS 300
9 listings starting at $7,995

Used Cars For Sale

2003 Lexus RX 300 Base AWD For Sale
1 listings starting at $9,800
2002 Lexus RX 300 Base AWD For Sale
1 listings starting at $3,900
2000 Lexus RX 300 Base AWD For Sale
2 listings starting at $4,850

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.