DTC P0172

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The front oxygen sensor sends signals on exhaust gas oxygen content to the PCM to control a 14.7:1 air/fuel ratio under normal driving conditions. The PCM can make fuel corrections from a nominal 128 (0% correction) short/long term fuel trim value to a maximum window of 101–147 (21 to +15 pe...

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Document Tags

Document Title: DTC P0172

oxygen

sensor

exhaust

control

fuel

short

term

trim

value

rich

condition

voltage

lean

cell

idle

cruise

used

system

evap

purge

canister

test

engine

pressure

intake

term fuel

fuel trim

fuel control

trim cell

control system

purge term

engine fuel

intake exhaust

short term fuel

term fuel trim

injector pulse width

fuel trim cell

fuel control system

evap canister purge

purge term fuel

test engine fuel