P0443 Woes

DillJLoc

Junior Member
Joined
Apr 18, 2025
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Location
Texas
2010 Mustang Base V6 175k miles - bought as a weekend cruiser.
Came with a whole slew of codes. Got majority to go away. Only thing now is the P0443. I replaced with new OEM replacement part. Clear the code and within minutes, the CEL comes back with P0443. Also get O2 sensor code P0141. Replaced all O2 sensors.
I tested the power supply with a test light, turn key and light illuminates, turn key off and light out.
Not a mechanic here, don’t have a smoke machine.
Any thoughts on where to look or experience in this same issue.

Much appreciated.
 

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