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.
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.
Images (Click to enlarge)
Wednesday, June 29th, 2022 AT 10:48 AM