Wiring Problem Check Engine 2000 Toyota Avalon

Asked by Aug 19, 2017 at 01:41 PM about the 2000 Toyota Avalon XLS

Question type: Maintenance & Repair

I keep getting the same codes on my 2000 model Avalon P1346, P1135, and P1155. I have change all the O2 sensors(3) and both camshaft sensors, I am still getting the same codes. Toyota service found a wire not connected to anything and they think it may be part of, if not, the problem. It is a gray wire w/ darker gray or silver stripes around it on the passenger side of the car it is coming from the wiring harness going into the cabin. It has power on it, 12v and if I unplug the 15a fuse to the EFI#1 or the 7.5a fuse to the EFI#2 or pull the EFI relay the voltage goes to 1 to 3 volts and fluctuates. I have the Haynes book for this model car, but I can't find a reference to this wire. It is coming out of the wiring harness where the wire to the spark plugs at Cyl. #1  are coming out but there is no connector or other wire in that area that it seems to go to. I am open to suggestions at this point. Dealer estimates between $400 and $1000 to fix sensor problems.

2 Answers


BBB industries.com wiring diagram

Thanks for your suggestion Guru9FSV8 couldn't find what I was looking for though.

Your Answer

Toyota Avalon Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

Related Models For Sale

Used Toyota Camry
113 Great Deals out of 2,271 listings starting at $1,599
Used Honda Accord
79 Great Deals out of 1,124 listings starting at $2,000
Used Toyota Highlander
29 Great Deals out of 843 listings starting at $2,244
Used Toyota Corolla
279 Great Deals out of 3,989 listings starting at $2,200
Used Nissan Maxima
42 Great Deals out of 385 listings starting at $2,495
Used Toyota RAV4
64 Great Deals out of 3,331 listings starting at $1,891
Used Nissan Altima
132 Great Deals out of 1,410 listings starting at $2,200
Used Toyota 4Runner
10 Great Deals out of 552 listings starting at $2,254
Used Chevrolet Impala
173 Great Deals out of 1,093 listings starting at $1,500
Used Honda Civic
358 Great Deals out of 3,822 listings starting at $1,250
Used Toyota Sienna
26 Great Deals out of 1,136 listings starting at $2,919

Used Cars For Sale

2018 Toyota Avalon For Sale
34 listings starting at $42,191
2017 Toyota Avalon For Sale
16 listings starting at $33,997
2016 Toyota Avalon For Sale
13 listings starting at $32,995
2015 Toyota Avalon For Sale
12 listings starting at $26,488
2014 Toyota Avalon For Sale
19 listings starting at $19,957

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.