Misfire codes reading P0300 in between p03023 and code P0400, P0491 and p0492.
Mar 10, 2019 at 10:39 AM
Code misfires
2005 VOLKSWAGEN PASSAT
702BIGSEXY
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Good afternoon,
The 300 is for multiple misfires. This could be plugs and coils which is common on these engines.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
The 491,492 are for the secondary air injection system.
Roy
P0491
Descriptor
Secondary Air Injection System Insufficient Flow Bank 1
Probable Causes
Proper Seal Secondary Air System
Secondary Air Injection (AIR) Pump Relay J299
The 300 is for multiple misfires. This could be plugs and coils which is common on these engines.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
The 491,492 are for the secondary air injection system.
Roy
P0491
Descriptor
Secondary Air Injection System Insufficient Flow Bank 1
Probable Causes
Proper Seal Secondary Air System
Secondary Air Injection (AIR) Pump Relay J299
Mar 10, 2019 at 11:01 AM
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