Isuzu Trooper 1999 Workshop Manual page 1216

DTC P1404 – EGR Stuck Closed (Cont'd)
Step
9 Replace the EGR valve.
Does DTC P1404 still fail "DTC" test on the Tech 2?
10 Replace the PCM.
IMPORTANT: The
programmed.
Powertrain Control
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
must be
for
—
6E–415
Yes No
Go to Step 10
Verify repair
Verify repair —