1A-298 Engine Control System (4HK1)
DTC P2458 (Flash Code 139)
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.
Once the regeneration starts, it must be finished within
a certain time. If the regeneration process is
continuously over a predetermined time, this DTC will
set.
Condition for Running the DTC
• DTCs P0079, P0080, P0116, P0117, P0118,
P0122, P0123, P0201 - P0204, P0335, P0336,
P0404, P0409, P0426, P042B, P042C, P042D,
P0427, P0428, P0500, P0502, P0503, P060B,
P0638, P0641, P0651, P1261, P1262, P1404,
P2146, P2149, P2227, P2228, P2229, P2452 -
P2456 are not set.
• The ignition switch is ON.
• The vehicle is running or the PTO control is
inactive.
• The DPD filter regeneration is finished.
Condition for Setting the DTC
• The DPD filter regeneration process is
continuously over a predetermined time.
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
• Use the Temperature vs. Resistance table to test
the exhaust temperature sensor at various
temperature levels to evaluate the possibility or a
skewed sensor.
• Fuel system problem (e.g. fuel injector damage)
may set this DTC.
• Deteriorated or damaged oxygen catalyst will set
this DTC.
• If regeneration time is longer than normal, refer to
DPD System Regeneration Long Time chart in
symptom diagnostic table.
Notice:
Under a driving condition that the exhaust
temperature will not be stable during the DPD filter
regeneration process (e.g. frequent stop and start), this
DTC will set.
Circuit/ System Testing DTC P2458
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
1.
Install a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Start the engine.
4.
Monitor the DTC Information with a scan tool.
Is DTC P0079, P0080, P0426, P0427, P0428,
P042B, P042C or P042D set?
—
Go to Applicable
DTC
Go to Step 3
LG4HKED-WE-0871.book 298
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