Codes P1101 and P0420, after replacing the MAF sensor?

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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I would try a Delphi MAF sensor. Sometimes the reading can be off in aftermarket sensor which will cause both of these codes. Also, you might want to remove the inlet/outlet of the turbo to see if the main shaft has excessive play, this will fool the MAF sensor and cause mixture issues like you are having. Please let me know, Ken
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Monday, December 15th, 2025 AT 12:04 PM

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