DTC Code | DTC Name |
---|---|
P2454 | Diesel Particulate Filter Pressure Sensor "A" Circuit Low |
P2455 | Diesel Particulate Filter Pressure Sensor "A" Circuit High |
DESCRIPTION
The ECM compares the exhaust gas pressure before and after the DPF* catalytic converter using a semiconductor-type differential pressure sensor.
If the differential pressure exceeds a predetermined level, the ECM judges that the catalytic converter has clogged with particulate matter (PM). At that time, the ECM begins to perform DPF catalyst regeneration.
*: Diesel Particulate Filter
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P2454 | Diesel Particulate Filter Pressure Sensor "A" Circuit Low |
Differential pressure sensor output voltage is 0.35 V or less for 2 seconds. (2 trip detection logic) |
|
Comes on | DTC stored |
P2455 | Diesel Particulate Filter Pressure Sensor "A" Circuit High |
Differential pressure sensor output voltage is 4.9 V or higher for 2 seconds. (2 trip detection logic) |
|
Comes on | DTC stored |
DTC No. | DTC Detection Drive Pattern |
---|---|
P2454 | Ignition switch ON for 2 seconds |
P2455 |
DTC No. | Data List |
---|---|
P2454 | DPF Differential Pressure |
P2455 |
If the DPF Differential Pressure outputs a negative value when the engine is maintained at an engine speed of 3000 rpm with no load, the hose and pipe connections may be incorrect.
WIRING DIAGRAM
*a | Differential Pressure Sensor |
CAUTION / NOTICE / HINT
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
READ VALUE USING GTS (DPF DIFFERENTIAL PRESSURE)
Connect the GTS to the DLC3.
Start the engine and turn the GTS on.
Depress and release the accelerator pedal repeatedly several times.
Enter the following menus: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.
Powertrain > Engine and ECT > Data ListTester Display |
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DPF Differential Pressure |
Read the value when depress and release the accelerator pedal.
Result | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
B | Нажмите здесь |
GO TO STEP 3 |
C |
CHECK FOR INTERMITTENT PROBLEMS Click hereНажмите здесь |
A |
CHECK CONNECTION OF VACUUM TRANSMITTING HOSE (DIFFERENTIAL PRESSURE SENSOR - VACUUM TRANSMITTING PIPE)
Check if vacuum transmitting hoses routing between the differential pressure sensor and the vacuum transmitting pipe is correct.
*1 | Differential Pressure Sensor | *2 | Vacuum Transmitting Hose (for upstream) |
*3 | No. 2 Vacuum Transmitting Hose (for downstream) | - | - |
*a | Marked: Yellow | *b | Marked: Pink |
*c | Marked: Red | *d | Marked: Orange |
Check that there is no exhaust gas leak between the differential pressure sensor and the vacuum transmitting pipe.
OK |
---|
The vacuum transmitting hoses routing is correct and there is no exhaust gas leak. |
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
GO TO STEP 10 |
OK |
CHECK BLOCKAGE OF VACUUM TRANSMITTING HOSE AND TRANSMITTING PIPE
ОСТОРОЖНО
Be careful of being burned by exhaust gases during the following inspection.
Disconnect both vacuum transmitting hoses (upstream and downstream) on the differential pressure sensor.
Start the engine.
Check if there are exhaust gas pulsations from both vacuum transmitting hoses during idling.
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CHECK HARNESS AND CONNECTOR (DIFFERENTIAL PRESSURE SENSOR - ECM)
Disconnect the differential pressure sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
REPLACE DIFFERENTIAL PRESSURE SENSOR
Replace the differential pressure sensor.
Click here Нажмите здесь
Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher (A).
Turn the ignition switch off and wait for 30 seconds or more (B).
Repeat the above procedures (A) and (B) 3 times.
Procedures (A) and (B) must be repeated 3 times to complete the differential pressure sensor learning process.
Result | ||
---|---|---|
|
NEXT |
CHECK WHETHER DTC OUTPUT RECURS (DTC P2454 OR P2455)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON and wait for 10 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Read the pending DTCs.
Powertrain > Engine and ECT > Trouble CodesResult | ||||||
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|
B |
END |
A |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON and wait for 10 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Confirm that the pending DTC is not output again.
Powertrain > Engine and ECT > Trouble CodesResult | ||
---|---|---|
|
NEXT |
END |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 8 |
REPAIR OR REPLACE MALFUNCTIONING PARTS
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 8 |