Check engine light issue
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Junior Member
Joined: Nov 2023
Posts: 1
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From: austin
Check engine light issue
Hey Guys, I have a 2005 Mazda 3 2.3L Sedan. Automatic. 180,000 miles. I was originally popping code P0442 and P0456 for an evap emission system leak detected, very small leak detected. Replaced the gas cap and leak detection pump which did not solve the issue. Had a smoke machine test which came back negative. Next I replaced the purge valve and now I'm pulling codes P0455(large leak) and P0441(incorrect purge flow).
Anyone have any ideas?
Anyone have any ideas?
Senior Member
Joined: Oct 2018
Posts: 10,665
Likes: 233
From: Northern California
Welcome to the forum
If you check all the Emission parts and components then I would recommend have a pass-through done with the ECU with the last update that was available for your Mazda. This should rule out the possible faulty ECU issues.
Without physically testing all the possibilities when it comes to Emission monitored ECU systems it is really hard to internet diagnosis.
If you check all the Emission parts and components then I would recommend have a pass-through done with the ECU with the last update that was available for your Mazda. This should rule out the possible faulty ECU issues.
Without physically testing all the possibilities when it comes to Emission monitored ECU systems it is really hard to internet diagnosis.
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