Isuzu 2008MY N Series User Manual

Engine Control System (4HK1) 1A-283
DTC P242F (Flash Code 131)
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 lamp or "PUSH DPD
SWITCH" indicator on the instrument panel cluster. If
the ECM detects that the exhaust differential pressure
is more than a predetermined range of the calculated
value, this DTC will set.
Condition for Running the DTC
• DTCs P0500, P0502 and P0503 are not set.
• The ignition switch is ON.
• The exhaust gas temperature 1 (in front of filter) is
more than 100°C (212°F).
• The engine speed is more than 1000RPM.
• The EGR position is less than 95%.
• The intake throttle position is more than 14%.
• The DPD filter regeneration is inactive.
Condition for Setting the DTC
• The exhaust differential pressure is more than a
predetermined range of the calculated differential
pressure value for longer than 30 seconds.
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
• Misrouted, disconnected or plugged exhaust
differential pressure hoses or pipes may set this
DTC.
• If manual regeneration is frequently requested,
refer to DPD System Manual Regeneration
Frequently in this section.
Notice: This DTC is caused by incomplete automatic
regeneration has occurred and manual regeneration
urged by the DPD lamp or "PUSH DPD SWITCH"
indicator blinking was disregarded or forgot, which was
most likely caused by driver error. Primarily ask the
driver about DPD lamp or "PUSH DPD SWITCH"
indicator blinking in the past.
Circuit/ System Testing DTC P242F
Step Action Value(s) Yes No
1
Did you perform the Diagnostic System Check
- Engine Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
Ask the driver about DPD lamp or "PUSH DPD
SWITCH" indicator blinking in the past. Explain
DPD filter regeneration and the DPD lamp or
"PUSH DPD SWITCH" indicator blinking to the
driver as necessary.
Notice: If manual regeneration is frequently
requested, refer to DPD System Manual
Regeneration Frequently in this section.
Did you complete the action?
—
Go to Step 3
—
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Isuzu 2008MY N Series Specifications

General

Brand	Isuzu
Model	2008MY N Series
Category	Control Systems
Language	English