O2 Sensors & Error Codes
Thread Starter
Audiworld Junior Member
Joined: Feb 2008
Posts: 11
Likes: 0
O2 Sensors & Error Codes
I've searched the forum but am still a bit confused...
Is Bank 2 pre-cat and Bank 1 post-cat?
Is Sensor 1 driver's side and Sensor 2 passenger side?
Error messages are:
P0155 - Heater malfunction (Bank 2 Sensor 1)
P0135 - Heater malfunction (Bank 1 Sensor 1)
Thanks!
Chris
Is Bank 2 pre-cat and Bank 1 post-cat?
Is Sensor 1 driver's side and Sensor 2 passenger side?
Error messages are:
P0155 - Heater malfunction (Bank 2 Sensor 1)
P0135 - Heater malfunction (Bank 1 Sensor 1)
Thanks!
Chris
AudiWorld Super User
Joined: Oct 2003
Posts: 18,424
Likes: 3
Bank 1 is the side where cyl 1 is. For Audi it the Passenger Side.
Sensor one it the front sensor 2 is the rear.
In both cases your front 02 sensors are showing a code. Clear them and see if they both return.
Sensor one it the front sensor 2 is the rear.
In both cases your front 02 sensors are showing a code. Clear them and see if they both return.
Thread Starter
Audiworld Junior Member
Joined: Feb 2008
Posts: 11
Likes: 0
So it should be:
Sensor 1 is Pre-Cat (front)
Sensor 2 is Post-Cat (rear)
Bank 1 is Driver's side
Bank 2 is Pass side
They do return and I've already bought the O2 sensors. Need to replace in order to pass DEQ here in Oregon.
Thanks for the info.
Sensor 1 is Pre-Cat (front)
Sensor 2 is Post-Cat (rear)
Bank 1 is Driver's side
Bank 2 is Pass side
They do return and I've already bought the O2 sensors. Need to replace in order to pass DEQ here in Oregon.
Thanks for the info.
AudiWorld Member
Joined: Nov 2005
Posts: 134
Likes: 0
From: Colorado Springs, CO
Not too derail your thread, but I have a similar question. Below is the message VAG-COM is returning the following for address 01. I've thrown it twice in a month. The first time I was greeted with a CEL, which VAG-COM revealed to be the below. I did not clear the code and the CEL went off a few days later on it's own. That lasted two weeks, but a CEL with the same VAG-COM message just reappeared last night.
17521 - Oxygen (Lambda) Sensor; B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
My logic says that the pre-cat O2 sensor on the passenger side is failing, but I want to confirm this is the case before purchasing a new one.
17521 - Oxygen (Lambda) Sensor; B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
My logic says that the pre-cat O2 sensor on the passenger side is failing, but I want to confirm this is the case before purchasing a new one.
Trending Topics
AudiWorld Member
Joined: Nov 2005
Posts: 134
Likes: 0
From: Colorado Springs, CO
AudiWorld Stories
Bringing Audi to Life for Audi Fans
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer
Brett Foote
10 Audi Features & Options We Miss the Most!
Joe Kucinski
Audi Recreates Crazy-Looking Speed Record Breaker From 1935
Verdad Gallardo
Coachbuilder Recreates the 1995 Audi TTS Concept
Verdad Gallardo
Every Audi V10 Car Ranked!
Joe Kucinski
9 Audi Designs That Aged Like Fine Wine
Verdad Gallardo
2026 Audi Q5 Buyer's Guide (Every Model Explained)
Brett Foote
Ranking Every Current Audi 'S' Model From Worst to First!
Joe Kucinski
10 Best Audis That are FINALLY LEGAL to Import to the U.S.!
Joe Kucinski
AudiWorld Senior Member
Joined: Aug 2009
Posts: 937
Likes: 4
"Internal Resistance too High" means open circuit. This is either electrical problem (check the wires) or the sensor itself. I would advise swapping the sensors around to see if the code migrates. If it still shows on the same bank but with the other sensor... electrical problem.
Thread
Thread Starter
Forum
Replies
Last Post
Aman Singh Parhar
A8 / S8 (D3 Platform) Discussion
7
Nov 29, 2016 05:03 AM
jeffkruse
A6 / S6 (C5 Platform) Discussion
6
Sep 14, 2015 02:28 PM
