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Codes P2444 and P2433, air system

Tiny
SHADAD KHAN
  • MEMBER
  • 2006 SUBARU IMPREZA
  • 2.0L
  • 4 CYL
  • 4WD
  • MANUAL
  • 139,000 MILES
Hi,

I have 2 codes showing. I changed air pump last week. Since then 2 codes are showing. I need some help. Can I clean these 2 parts.
Sunday, August 8th, 2021 AT 12:07 PM

2 Replies

Tiny
SHADAD KHAN
  • MEMBER
  • 2 POSTS
I have these faults showing. I replaced new air pump. Can I clean mass air flow sensor with carburetor cleaner and same to secondary air valve?
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Sunday, August 8th, 2021 AT 12:10 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Is this vehicle outside the USA? I just don't show this engine as an option on this vehicle which also means the codes don't show up in the manual either.

However, this secondary air injection system does cause issues because it gets soot in it from the exhaust. So we may have an issue with things getting sooted.

It is unlikely that the MAF is causing these issues but here is a guide that will help with cleaning it:

https://www.2carpros.com/articles/mass-air-flow-service

I would suggest pulling the tubes off and cleaning them out as well. I can't find any info on this system as we don't have a manual on this engine but there should be a control valve as well as the pump. So basically the way these work is the air pump pushes air into the exhaust on cold starts but there should be a valve that opens and closes to allow the air in.

If there is a valve on this, then I would clean it or replace it the same as the MAF above.
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Monday, August 9th, 2021 AT 8:01 PM

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