DTC P2456:00 [PCM (SKYACTIV-D)]
id0102t5154000
Outline
|
System malfunction location |
Exhaust gas pressure sensor No.2: Characteristic malfunction |
|
|---|---|---|
|
Detection condition
|
• When the following conditions are met, the PCM detects a difference of less than 0.1 kPa {0.001 kgf/cm2, 0.01 psi} for a consecutive 8 times between the value detected by exhaust pressure sensor No.2 when the exhaust amount is 2.0 m3/min or more and the value detected by exhaust pressure sensor No.2 when the exhaust amount is less than 0.85 m3/min.
|
|
|
Fail-safe
|
• PCM restricts engine torque.
• Limits the maximum engine speed.
• Inhibits the DENOx/DESOx control.
• Inhibits the diesel particulate filter regeneration control.
• Inhibits the EGR control.
|
|
|
Possible cause
|
• Exhaust gas pressure sensor No.2 connector or terminal malfunction
• Pipe clogging or damage between exhaust sensor No.2 and catalytic converter
• PCM connector or terminal malfunction
• Exhaust gas pressure sensor No.2 malfunction
• PCM malfunction
|
|
|
System wiring diagram
|
• Not applicable
|
|
|
Connector diagram
|
• Not applicable
|
|
Diagnostic Procedure
|
Step |
Inspection |
Results |
Action |
|---|---|---|---|
|
1
|
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the freeze frame data/snapshot data.
|
—
|
Go to the next step.
|
|
2
|
VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins, on-line repair information, or Service Information availability.
• Is any related Information available?
|
Yes
|
Perform repair or diagnosis according to the available information.
• If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
||
|
3
|
INSPECT EXHAUST GAS PRESSURE SENSOR No.2 CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
4
|
INSPECT PCM CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
5
|
INSPECT EXHAUST GAS PRESSURE SENSOR No.2-RELATED PIPING
• Visually inspect the exhaust gas pressure No.2-related piping for clogging, damage, or less.
• Is the exhaust gas pressure sensor No.2-related piping normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
6
|
INSPECT EXHAUST GAS PRESSURE SENSOR oO.2 FOR MALFUNCTION
• Inspect the applicable part.
• Is the part normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
Repair completion verification 1
|
VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
• Perform the DTC inspection for the PCM.
(See DTC INSPECTION.)
• Is the same Pending DTC present?
|
Yes
|
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
Repair completion verification 2
|
VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection.
(See DTC INSPECTION.)
• Are any other DTCs displayed?
|
Yes
|
Repair the malfunctioning location according to the applicable DTC troubleshooting.
|
|
No
|
DTC troubleshooting completed.
|