1998 audi a4 quattro

You make it sound like it's our fault you can't find it :>D

The start of production of the Audi A4 B5 is 1994. With minor changes, it was produced until 2001. At first, only the sedan version was available, the station wagon (Avant) appeared a year later. This material provides information on relay circuits and fuses Audi A4 b5 1994, 1995, 1996, 1997, 1998, 1999, 2000, with an assignment of their elements and locations.

Can't get much clearer than this. Relay 4 is one plus 'Additional Relays 23 and 24. Plus fuse 23 and 24.

Fuse box diagram Audi A4 B5 and relay with assignment ...

https://fuseandrelay.com > audi > a4-b5

This material provides information on relay circuits and fuses Audi A4 b5 1994, 1995, 1996, 1997, 1998, 1999, 2000, with an assignment of their elements and ...
‎Passenger compartment · ‎Main fuse box · ‎Relay box · ‎Engine compartment

this is the o2 sensor after the pre cat so post cat you can get a tune to get rid of code or replace the o2 sensor or get spacer that screws into the cat witch will make it not code the o2 sensor is there to just make sure the cat is there for emissions and will not effect the gas milage

this can either be a bad cat or o2 sensor its the after cat downstream driver side you can either replace the o2 sensor or buy a spacer from 034 Motorsports to get rid of this problem or get a tune alls it does is checking if the cat is there for emissions will not effect gas mileage. Owner of Audi A6 2.7T 2001.B2 S1 is drivers side pre cat

B1 = Passenger side
B2 = Drivers side
S1 = Pre cat
S2 = Post Cat Example s1:b1

141 o2 sensor heater, bank 1, sensor 2

The serpentine belt routing diagram for 1998 Audi A4 Quattro 2.8 liters V6 engine:



CS = Crankshaft
F = Fan pulley
Gen = Alternator
T = Tensioner pulley
AC = Air Conditioning
PAS = Power Assisted Steering

The dealer has to "reflash" your 02 sensor light. On some Audi's, the dealer has to reset the O2 code first and if it comes on again, then they will need to replace the cat convertors.

whatever,change the O2 sensor,then recheck codes.

i think there is only one, it is connected to the exhaust manifold just before the cat, if you check all away allong you might find another just before the rear muffler?silencer/back box, the first one is called the heated oxygen sensor (ho2s) but i think there is only one...hope this helps

No, there is no fuse.

If the temp is always showing max on the gauge there is a problem in the sensor circuit. This could mean the wiring or the temperature sensor itself.

It appears you have a bad o2 sensor


Robert