Mk4 golf 2.0 20v gti 03 plate warning code

[Big muz]

Hi folks just joined the club , got a mk4 gti 03 plate had golfs for the last 15 yrs or so , got a fault code 16804 am i right in thinking its front lamba ? Great site by the way !!!

[damien010685]

16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold
Possible Causes
Leakage in Intake and/or Exhaust System
Catalyst faulty
Oxygen Sensor(s) faulty
Oxygen Sensor(s) Control faulty
Possible Solutions
Check Intake and Exhaust System for Leaks
Check Catalyst
Check Oxygen Sensor(s)
Check Oxygen Sensor(s) Control
Perform Oxygen Sensor(s) Aging Check


Welcome mate to the mk4 section be prepared for plenty of fault codes owning the 2.0

[Big muz]

Hows it going ive had a few codes over the years !!! Ive had a new cat and rear lamba fitted in april had all pipes checked and exhaust fir leaks , my brother in law plugged his laptop in to my car the day he has latest vag com software and it said no 1 lamba was just checking if anyone else has had same problem , was going to try lamba first to see if it would keep light out !!!wil try and post a few pics of car up soon .

[Big muz]

Where can i get some if those etched window stickers ?

[damien010685]

If it the lamba just clear the code it goes away for about 6 mths... Which stickers are you on about?

[Big muz]

The etched ones that go on inside of windows.

[damien010685]

http://www.golfgti.bigcartel.com/

[Big muz]

All sold out !!

[dom]

Pm jv about the stickers.

I thought the 2.0 engines were all 8v?

[asboGTI]

Pm jv about the stickers.

I thought the 2.0 engines were all 8v?

They are unless he typed it wrong or got a na 1.8