Code misfires

Tiny
702BIGSEXY
  • MEMBER
  • 2005 VOLKSWAGEN PASSAT
  • 2.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 148,000 MILES
Misfire codes reading P0300 in between p03023 and code P0400, P0491 and p0492.
Sunday, March 10th, 2019 AT 10:39 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Sunday, March 10th, 2019 AT 11:01 AM

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