2002 Audi A4 emission

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Condition	Value

expand_moreDiesel exhaust gas values

expand_moreCut-off control speed


All Audi diesel V6 2.5 L AYM engines	4500–5500 rpm4500–5500 rpm4500–5500 rpm

expand_moreAll Audi diesel V6 2.5 L BFC engines


BFC engine	4500–5500 rpm4500–5500 rpm4500–5500 rpm
Otherwise	4650–4950 rpm4650–4950 rpm4650–4950 rpm


All other modifications	4800–5200 rpm4800–5200 rpm4800–5200 rpm


Diesel conditioning gas injections	10
from 60° C engine oil temperature

expand_moreDiesel conditioning speed


All Audi diesel V6 2.5 L AYM engines	4500–5500 rpm4500–5500 rpm4500–5500 rpm
from 60° C engine oil temperature

expand_moreAll Audi diesel V6 2.5 L BFC engines


BFC engine	4500–5500 rpm4500–5500 rpm4500–5500 rpm
from 60° C engine oil temperature
Otherwise	4650–4950 rpm4650–4950 rpm4650–4950 rpm
from 60° C engine oil temperature


All other modifications	4800–5200 rpm4800–5200 rpm4800–5200 rpm
from 60° C engine oil temperature


Maximum K-value	2 1/m2 1/m2 1/m
Measuring mode	B
Measuring sensor	1
Measuring time	0.5 s0.5 s0.5 s
Stoppage time	1 s1 s1 s

expand_moreGeneral exhaust gas values


Diagnostic socket location	The diagnostic socket is at the lower edge of the dashboard on the driver's side.

expand_moreIdling speed with automatic gearbox


All Audi gasoline straight-4 2.0 L ALT engines	700–960 rpm700–960 rpm700–960 rpm
All Audi gasoline V6 2.4 L AMM engines	670–770 rpm670–770 rpm670–770 rpm
All Audi gasoline V6 3.0 L ASN engines	680–820 rpm680–820 rpm680–820 rpm
All Audi diesel straight-4 1.9 L AVB engines	800–950 rpm800–950 rpm800–950 rpm
All Audi diesel straight-4 1.9 L AVF engines	800–950 rpm800–950 rpm800–950 rpm
All Audi gasoline straight-4 1.8 L AVJ engines	740–880 rpm740–880 rpm740–880 rpm
All Audi gasoline V6 3.0 L AVK engines	680–820 rpm680–820 rpm680–820 rpm
All Audi gasoline straight-4 2.0 L AWA engines	640–800 rpm640–800 rpm640–800 rpm
All Audi diesel straight-4 1.9 L AWX engines	800–950 rpm800–950 rpm800–950 rpm
All Audi diesel V6 2.5 L AYM engines	740–840 rpm740–840 rpm740–840 rpm
All Audi gasoline V6 3.0 L BBJ engines	680–800 rpm680–800 rpm680–800 rpm
All Audi gasoline V6 2.4 L BDV engines	670–770 rpm670–770 rpm670–770 rpm
All Audi gasoline straight-4 1.8 L BEX engines	680–900 rpm680–900 rpm680–900 rpm
All Audi gasoline straight-4 1.8 L BFB engines	650–850 rpm650–850 rpm650–850 rpm

expand_moreAll Audi diesel V6 2.5 L BFC engines


BFC engine	740–840 rpm740–840 rpm740–840 rpm
Otherwise	660–860 rpm660–860 rpm660–860 rpm

expand_moreIdling speed with manual gearbox


All Audi gasoline straight-4 2.0 L ALT engines	700–960 rpm700–960 rpm700–960 rpm
All Audi gasoline straight-4 1.6 L ALZ engines	700–960 rpm700–960 rpm700–960 rpm
All Audi gasoline V6 2.4 L AMM engines	670–770 rpm670–770 rpm670–770 rpm
All Audi gasoline V6 3.0 L ASN engines	680–820 rpm680–820 rpm680–820 rpm
All Audi diesel straight-4 1.9 L AVB engines	800–950 rpm800–950 rpm800–950 rpm
All Audi diesel straight-4 1.9 L AVF engines	800–950 rpm800–950 rpm800–950 rpm
All Audi gasoline straight-4 1.8 L AVJ engines	740–880 rpm740–880 rpm740–880 rpm
All Audi gasoline V6 3.0 L AVK engines	680–820 rpm680–820 rpm680–820 rpm
All Audi gasoline straight-4 2.0 L AWA engines	640–800 rpm640–800 rpm640–800 rpm
All Audi diesel straight-4 1.9 L AWX engines	800–950 rpm800–950 rpm800–950 rpm
All Audi diesel V6 2.5 L AYM engines	740–840 rpm740–840 rpm740–840 rpm
All Audi gasoline V6 3.0 L BBJ engines	680–800 rpm680–800 rpm680–800 rpm
All Audi gasoline V6 2.4 L BDV engines	670–770 rpm670–770 rpm670–770 rpm
All Audi gasoline straight-4 1.8 L BEX engines	680–900 rpm680–900 rpm680–900 rpm
All Audi gasoline straight-4 1.8 L BFB engines	650–850 rpm650–850 rpm650–850 rpm

expand_moreAll Audi diesel V6 2.5 L BFC engines


BFC engine	740–840 rpm740–840 rpm740–840 rpm
Otherwise	660–860 rpm660–860 rpm660–860 rpm


Minimum engine oil temperature at VET	176°F176°F80°C

expand_morePetrol exhaust gas values


CO content at idling speed	0–0.5 %0–0.5 %0–0.5 %

expand_moreCO content at increased idling speed


All Audi gasoline straight-4 1.6 L ALZ engines	0–0.3 %0–0.3 %0–0.3 %
All Audi gasoline V6 2.4 L AMM engines	0–0.3 %0–0.3 %0–0.3 %
All Audi gasoline V6 3.0 L ASN engines	0–0.3 %0–0.3 %0–0.3 %
All Audi gasoline V6 3.0 L AVK engines	0–0.3 %0–0.3 %0–0.3 %
All Audi gasoline V6 2.4 L BDV engines	0–0.3 %0–0.3 %0–0.3 %
All other modifications	0–0.2 %0–0.2 %0–0.2 %

expand_moreIncreased idling speed


All Audi gasoline straight-4 1.6 L ALZ engines	2500–3200 rpm2500–3200 rpm2500–3200 rpm
All Audi gasoline V6 2.4 L AMM engines	2500–3200 rpm2500–3200 rpm2500–3200 rpm
All Audi gasoline straight-4 2.0 L AWA engines	4000–4500 rpm4000–4500 rpm4000–4500 rpm
All other modifications	2500–3000 rpm2500–3000 rpm2500–3000 rpm

expand_moreLambda sensor design


All Audi gasoline straight-4 1.6 L ALZ engines	Jump type lambda sensor
All Audi gasoline V6 2.4 L AMM engines	Jump type lambda sensor
All Audi gasoline V6 2.4 L BDV engines	Jump type lambda sensor
All other modifications	wideband sensor


Lambda value	0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ
Maximum HC content at idling	100 ppm100 ppm100 ppm

expand_morePetrol conditioning speed


All Audi gasoline straight-4 1.6 L ALZ engines	2500–3200 rpm2500–3200 rpm2500–3200 rpm
All Audi gasoline V6 2.4 L AMM engines	2500–3200 rpm2500–3200 rpm2500–3200 rpm
All Audi gasoline straight-4 2.0 L AWA engines	4000–4500 rpm4000–4500 rpm4000–4500 rpm
All other modifications	2500–3000 rpm2500–3000 rpm2500–3000 rpm


Petrol conditioning time	120 s120 s120 s

expand_moreTest speed for lambda sensor signal


All Audi gasoline straight-4 2.0 L ALT engines	700–960 rpm700–960 rpm700–960 rpm
All Audi gasoline straight-4 1.6 L ALZ engines	700–960 rpm700–960 rpm700–960 rpm
All Audi gasoline V6 2.4 L AMM engines	670–770 rpm670–770 rpm670–770 rpm
All Audi gasoline V6 3.0 L ASN engines	680–820 rpm680–820 rpm680–820 rpm
All Audi gasoline V6 3.0 L AVK engines	680–820 rpm680–820 rpm680–820 rpm
All Audi gasoline straight-4 2.0 L AWA engines	640–800 rpm640–800 rpm640–800 rpm
All Audi gasoline V6 3.0 L BBJ engines	680–800 rpm680–800 rpm680–800 rpm
All Audi gasoline V6 2.4 L BDV engines	670–770 rpm670–770 rpm670–770 rpm
All Audi gasoline straight-4 1.8 L BEX engines	680–900 rpm680–900 rpm680–900 rpm
All Audi gasoline straight-4 1.8 L BFB engines	650–850 rpm650–850 rpm650–850 rpm


Voltage swing at test speed	0.3 V0.3 V0.3 V
More than

To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by Audi.

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2002 Audi A4 user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Audi warranty policy for your region. In some regions DIY service may invalidate your warranty.

Maintenance Items

Service Intervals

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Audi A4 service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 2002 Audi A4 you're not only saving money, but also also improving your technical skills and learning something new.

2002 Audi A4 B6 Emission

Table of Contents

Conquer your fears and never give up!

Audi A4 B6 model years

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