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Engine DTCs (2)
p2097 Post catalyst Fuel Trim Sistem High Limit Bank 1, current(x) , histtory(x), This IGN(passed).
p2270 HO2S Signal Stuck Lean Bank 1 Sensor 2, Not current..,history(x), this IGN(passed)
Powertrain Interface Module (PIM)DTC(2) Not current,history(X), This IGN(passed)

Vehicle: Isuzo 2014 NPRHD 6.0L truck

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P2097 Post catalyst fuel trim system high limit Bank 1

P2270 H02S sensor signal Bank 1 Sensor 2

This is both the same code, Post catalytic is what is coming out of the catalytic, Sensor are downstream 02 sensor they are catalytic monitor sensor, all this mean is you have a lean condition, because of the lean condition the ECM made a correction by commanding the fuel trim to go rich, but it maxed out. it reached its limit. , what ever caused this lean condition it is not the 02 sensor, its working correctly, this could be from exhaust leak prior to the front 02 sensor, vacuum leaks , equivent ratio 1:00 : 1 this is good, this is the Lamba , when the engine is in fuel control Lamba equals 1. So everything fine.

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