Code P0133?

2007 MERCURY MILAN
195,000 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
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LIONELL8732
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hello, i recently replaced the exhaust manifold converter along with two brands new ngk oxygen sensors and my wife called and said that we have a P0133 code on. need some help.
Sep 10, 2023 at 6:03 PM
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STRAILER
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The code number is because of slow response from the sensor, the diagnostic trouble code (DTC) P0133

P0133: Oxygen Sensor Circuit Slow Response (Bank 1, Sensor 1)

I would say you have a defective sensor, but I would try clearing the codes and try it again in case it is a glitch in the system, or the new parts are recalibrating and it needs more time. Here is the location of the sensor so we can be on the same page. Check out the images (below). Please let us know what happens.
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Sep 11, 2023 at 5:32 PM
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LIONELL8732
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Okay, will keep you posted.
Sep 11, 2023 at 9:57 PM
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LIONELL8732
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Need help.
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Sep 15, 2023 at 10:13 PM
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STRAILER
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Yep, I have seen the MAF sensor cause this problem. I would swap it out and then clear the codes. Check out the images (below). Please let us know what you find.
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Sep 18, 2023 at 10:33 AM
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