Dtc P1455 (Flash Code 132) - Isuzu N 2008 Series Workshop Manual

DTC P1455 (Flash Code 132)

Description
The ECM detects the condition of PM accumulations
from the exhaust differential pressure sensor attached
to the chassis frame near the diesel particulate defuser
(DPD) assembly. When it is reached to a certain
amount of PM accumulations or a certain length of
mileage, the automatic regeneration starts. If the
automatic regeneration cannot be completed by some
reason, the manual regeneration is requested to the
driver by blinking the DPD amber lamp or "PUSH DPD
SWITCH" indicator on the instrument panel cluster. If
the DPD filter regeneration interval is more than a
predetermined mileage, this DTC will set.
Condition for Running the DTC
• DTCs P0500, P0502 and P0503 are not set.
• The ignition switch is ON.
Condition for Setting the DTC
• The DPD filter regeneration interval is more than
520 km (325 miles).
Circuit/ System Testing DTC P1455
Step
Did you perform the Diagnostic System Check -
1 Engine Controls?
Ask the driver about DPD amber lamp or "PUSH
DPD SWITCH" indicator blinking in the past.
Explain DPD filter regeneration and lamp action to
the driver as necessary.
2
Notice: If manual regeneration is frequently
requested, refer
Regeneration
diagnostic table.
Did you complete the action?
Action
to DPD System
Frequently chart in
Engine Control System (4JJ1)
Action Taken When the DTC Sets
• The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
• The ECM limits fuel injection quantity.
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the MIL/ DTC - Type A.
Diagnostic Aids
• If manual regeneration is frequently requested,
refer to DPD System Manual Regeneration
Frequently chart in symptom diagnostic table.
Notice: This DTC is caused by incomplete automatic
regeneration has occurred and manual regeneration
urged by the DPD lamp on the IP cluster was
disregarded or forgot, which was most likely caused by
driver error. Primarily ask the driver about DPD amber
lamp or "PUSH DPD SWITCH" indicator blinking in the
past.
Value(s)
—
—
Manual
symptom
Yes
Go to Diagnostic
System Check -
Go to Step 2 Engine Controls
Go to Step 3
1A-225
No
—