Trouble code# 25
Thread Starter
Lexus Champion
Joined: Feb 2001
Posts: 1,603
Likes: 5
From: Las Vegas, NV
My green 93 SC400 with 142K miles has giving me troble code 25. The car idle fine, good acceleration...
Has anyone got this code before?
Code 25 mean lean air fuel ratio, I checked the voltage between terminal VF1, VF2 and E1 of the DLC1. It looks like the problem is the left main O2 sensor.
Where is the Left and Right main O2 sensor? Do I have to look under the car?
The SC400 also has Sub-oxygen sensor, this sub-oxygen sensor is under the car.
The car has a total of 4 oxygen sensor ?
Thanks in advance
Has anyone got this code before?
Code 25 mean lean air fuel ratio, I checked the voltage between terminal VF1, VF2 and E1 of the DLC1. It looks like the problem is the left main O2 sensor.
Where is the Left and Right main O2 sensor? Do I have to look under the car?
The SC400 also has Sub-oxygen sensor, this sub-oxygen sensor is under the car.
The car has a total of 4 oxygen sensor ?
Thanks in advance
Thread Starter
Lexus Champion
Joined: Feb 2001
Posts: 1,603
Likes: 5
From: Las Vegas, NV
Originally posted by The Ikon
I'm sorry not yet... Thank God!!!
VQT did you ever get that engine cleaned on your other SC?
I'm sorry not yet... Thank God!!!
VQT did you ever get that engine cleaned on your other SC?
Found out that water did get in spark plug no. 5, dried it out, idle came back normal and good acceleration, but code # 25 kept showing up. Code 25 mean lean condition with the air fuel mixture.
With all the trouble shooting I done so far, it lead to the main Oxygen sensor...I need to check if the connectors are faulty and test them before replacing the sensors. The SC400 have 4 oxygen sensors:eek:
I don't know if this washing the engine is related to the problem or it's time the O2 need replacement...
Just change the oil and filter, transmission fluid, radiator fan fluid yesterday
all were dirty. Going to change the plugs, wires, radiator fluid, thermostat before really looking into this code 25. I am hoping that new plugs and wire will solve the problem.
Driver School Candidate
Joined: Feb 2001
Posts: 16
Likes: 0
From: Sydney, Australia
Code 25
Your last post says the car runs fine but Code 25 is still displayed. Have you tried to clear the error code/s stored in memory by removing the DOME fuse in the engine compartment fuse box for longer then 10 seconds?
Trending Topics
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Top 10 Reasons to Buy a Lexus TX 550h+ (& 3 Reasons to AVOID!)
Michael S. Palmer
Top 10 Lexus & Toyota Models of the 1990s RANKED!
Joe Kucinski
10 Great Toyotas That Could Have Been Lexus Models
Joe Kucinski
Thread Starter
Lexus Champion
Joined: Feb 2001
Posts: 1,603
Likes: 5
From: Las Vegas, NV
With all the things happening the last few days, my main office is in NY city, can't communicate with the main office at all, can't concerntrate to work either
My branch boss called (our branch office located in NJ) and ask if I'll volunteer to go to NY once our main office call (I work for the federal Government), guess I am going to work on rebuiling WTC once they find every body under that mess...I used to go to work in NY city via the subway where it stopped under building 1 less than 3 years ago, there are many people still stuck in that subway tunnel under the building. Many people around here (Philadelphia area) worked in WTC did not come home...
I haven't have time to check the O2 sensors yet but it looks like I may have to replace it.
$227.42 each from Carson Toyota:eek:
Do you know anyone else sell Lexus/Toyota parts?
My branch boss called (our branch office located in NJ) and ask if I'll volunteer to go to NY once our main office call (I work for the federal Government), guess I am going to work on rebuiling WTC once they find every body under that mess...I used to go to work in NY city via the subway where it stopped under building 1 less than 3 years ago, there are many people still stuck in that subway tunnel under the building.
Many people around here (Philadelphia area) worked in WTC did not come home... I haven't have time to check the O2 sensors yet
but it looks like I may have to replace it.$227.42 each from Carson Toyota:eek:
Do you know anyone else sell Lexus/Toyota parts?
My Parts Place
Thread Starter
Lexus Champion
Joined: Feb 2001
Posts: 1,603
Likes: 5
From: Las Vegas, NV
Re: My Parts Place
Originally posted by 928owner
Try Iron Toad... a WEB based parts distributor for Lexus parts. They are actually a "back-door" of a real Lexus Dealer in PA. Always get the best prices.
Try Iron Toad... a WEB based parts distributor for Lexus parts. They are actually a "back-door" of a real Lexus Dealer in PA. Always get the best prices.
Thanks 928owner
VQT 93 Green/pearl white SC400
Thread Starter
Lexus Champion
Joined: Feb 2001
Posts: 1,603
Likes: 5
From: Las Vegas, NV
Replaced two main O2 sensors Saturday, will find out if it fix the code 25 this week.
Found another dealer sell main O2 for $114 each, paid about ~ $240 for the pair with tax. Maybe Carson Toyota parts guy gave me the wrong price:eek:
It was very dificult to replaced even with right tools.
Found another dealer sell main O2 for $114 each, paid about ~ $240 for the pair with tax. Maybe Carson Toyota parts guy gave me the wrong price:eek:
It was very dificult to replaced even with right tools.
Thread
Thread Starter
Forum
Replies
Last Post
