Codes P2096 and P0420

Tiny
WESLEYMOREY12
  • MEMBER
  • 2015 FORD EDGE
  • 2.0L
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 74,000 MILES
Recently got a p2096 code on my fort edge 2.0 Ecoboost. I got it to reset and tonight I got it again. This time I got a p0420 code and p2096 code. I am thinking downstream O2 sensor, but before buying part want to make sure looking at correct thing, I read something about it possible purge valve. Also, where is the downstream O2 sensor located? I looked under car and couldn’t see it.
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Tuesday, June 28th, 2022 AT 11:20 PM

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Tiny
SQM
  • EXPERT
Hello,

The codes
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
P2096 - Post Catalyst Fuel Trim System Too Lean Bank 1

These codes can get triggered due to a number of reasons. It could be faulty oxygen sensor, exhaust leak, leaking fuel injectors, faulty catalytic converter. It can also be due to wiring issues for the oxygen sensor.

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

The downstream sensor is located on the upper part of the pipe. You will have to remove the driveshaft to access it.

I have attached the diagnostics for the codes below for your reference.
Also attached is the oxygen sensor replacement procedure.

Let me know of any questions.
Thank you.
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Wednesday, June 29th, 2022 AT 10:48 AM

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