P1167 Fuel System Rich During Decel Fuel Cut Off (Bank 1) - Isuzu 2000 Trooper Workshop Manual

P1167 Fuel System Rich During Decel Fuel Cut Off (Bank 1)

Circuit Description
The powertrain control module (PCM) continuously
monitors the heated oxygen sensor (HO2S) activity for 90
seconds after "closed loop" has been enabled. During the
monitoring period the powertrain control module (PCM)
counts the number of times a rich to lean and respones is
indicated and adds the amountof time it look to complete
all rich to lean transisitions and lean to rich transitions.
This code detects if Bank1 02 sensor indicated rich
exhaust while in Decel Fuel Cut Off (DFCO) for fuel
control sensors.
Conditions for setting the DTC
D No related DTCs.
D The engine coolant temperature is more than 60 °C
(140 °F).
D Engine is operating in "closed loop" power enrichment
mode for 3 secondes.
D While in "power enrichment" mode the oxygen sensor
voltage remains more than 600mV in DFCO.
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC)
Action Taken When the DTC Sets
D The PCM will not illuminate the malfunction
malfunction indicator lamp (MIL).
D The PCM will store condition which were present when
the DTC was set as Freeze Frame and in the Failure
Records data.
Conditions for Clearing the MIL/DTC
D A history DTC P1167 will clear after 40 cosecutive trip
cycle during which the warm up cycles have occurred
without a fault.
D DTC P1167 can be cleared using the Tech 2 "Clear
Info" function or by disconnecting the PCM battery
feed.
Diagnostic Aids
D Check for faulty fuel injectors and fuel pump.
6E–409
D06RY00171