VW Vortex - Volkswagen Forum banner
1 - 4 of 4 Posts

·
James Steed
Joined
·
12,162 Posts
Discussion Starter · #1 ·
I'm guessing it's my Bank 1 O2 sensor but just getting a second opinion.
2 Faults Found:
16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 35-10 --- Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-10 --- Intermittent

I got the 16804 code everyonce in a while but the 16518 code is new.
This is in a 1999.5 GTI GLX VR6
The only mods right now is a Cold Air Intake and a Cat Back exhaust.
Thanks
 

·
Vendor
ID.4, 997.1
Joined
·
15,434 Posts
Re: VAG-COM codes help needed (EPilot)

The first code indicates that the ECU isn't seeing the correct relationship between the pre-cat and post-cat O2 sensors, it suspects a faulty cat. The second code indicates an intermittent problem with your front O2 sensor or a problem with its wiring.
 
1 - 4 of 4 Posts
Top