If you are running an after market exhaust w/ a high-flow cat and are constantly getting that dreaded CEL, this part should fix it. It comes down to spacing your 02 sensor out of the direct airflow.???????? ????? ????????
2 Faults Found:
- 16804 - Catalyst System; Bank 1: Efficiency Below Threshold
P0420 - 35-10 - - - Intermittent - 16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
Car:
2000 1.8T New Beetle GLX running a GHL 2.5″ TB exhaust and GIAC software.
The steps should be identical to all MKIV’s. Placement of your sensors may vary based on your exhuats, but probably not.
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