DTC Code | DTC Name |
---|---|
P2454 | Diesel Particulate Filter Pressure Sensor "A" Circuit Low |
P2455 | Diesel Particulate Filter Pressure Sensor "A" Circuit High |
DESCRIPTION
For more information on the differential pressure sensor assembly and Diesel Particulate Filter (DPF), refer to the following procedures.
Click hereНажмите здесь
If P2454 and/or P2455 is present, refer to the DTC chart for DPF system.
Click hereНажмите здесь
The two sensing chambers of the differential pressure sensor assembly are mounted to monitor the pressure before and after the DPF catalytic converter. The sensor itself is not located on the engine assembly in order to reduce the influence of vibration.
The ECM compares the exhaust gas pressure before and after the DPF catalytic converter by monitoring the pressure using the upstream and downstream sensing chambers of the differential pressure sensor assembly. If the difference between the pressure before and after the DPF catalytic converter exceeds a predetermined level, the ECM judges that the catalytic converter is clogged with particulate matter (PM). When the ECM judges that a partially clogged condition exists, the ECM begins to perform PM forced regeneration.
When the output voltage of the sensor deviates from the normal operating range, the ECM interprets this as a malfunction of the sensor circuit, and sets DTC P2454 or P2455, and illuminates the MIL.
If the vacuum hoses of the differential pressure sensor assembly are incorrectly connected (crossed), the ECM interprets this as an abnormal pressure difference, DTC P2453 (Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance) is stored and the MIL illuminates.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P2454 | Diesel Particulate Filter Pressure Sensor "A" Circuit Low | Differential pressure sensor assembly output voltage is below 0.4 V for 3 seconds or more (1 trip detection logic). |
|
Comes on | DTC stored |
P2455 | Diesel Particulate Filter Pressure Sensor "A" Circuit High |
Differential pressure sensor assembly output voltage is higher than 4.8 V for 3 seconds or more. (1 trip detection logic) |
|
Comes on | DTC stored |
DTC No. | Data List |
---|---|
P2454 | DPF Differential Pressure |
P2455 |
DTC P2453 (Diesel Particulate Filter Pressure Sensor "A" Circuit Range / Performance) will be stored if there is incorrect vacuum hose routing to the differential pressure sensor assembly.
After confirming DTC P2454 and P2455, check the differential pressure in the "Powertrain / Engine and ECT / Data List / All Data / DPF Differential Pressure" menu using the GTS.
Condition | Differential Pressure Output | Sensor Condition |
---|---|---|
Ignition switch ON | Approximately 0 kPa | Normal |
Always | -5 kPa or less or higher than 99 kPa | Open or short circuit |
4000 rpm (No engine load) | Negative output | Incorrect hose routing |
MONITOR DESCRIPTION
In order to detect abnormality in the differential pressure sensor assembly, the ECM always monitors the output voltage from the sensor. When the sensor output voltage deviates from the normal operating range (between 0.4 V and 4.8 V) for more than 3 seconds, the ECM interprets this as a malfunction in the sensor circuit and illuminates the MIL.
CONFIRMATION DRIVING PATTERN
DTC No. | DTC Detection Drive Pattern |
---|---|
P2454 | Ignition switch ON for 5 seconds |
P2455 |
WIRING DIAGRAM
*a | Differential Pressure Sensor Assembly |
CAUTION / NOTICE / HINT
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click hereНажмите здесь).
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
CHECK WIRE HARNESS (DIFFERENTIAL PRESSURE SENSOR ASSEMBLY - ECM)
Disconnect the differential pressure sensor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
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NG | Нажмите здесь |
OK |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF DIFFERENTIAL PRESSURE SENSOR ASSEMBLY)
Disconnect the differential pressure sensor assembly connector.
*a |
Front view of wire harness connector (to Differential Pressure Sensor Assembly) |
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY
Replace the differential pressure sensor assembly.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 6 |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 6 |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds.
Turn the ignition switch to ON and wait for 5 seconds.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Confirm that the DTC is not output.
Powertrain > Engine and ECT > Trouble CodesResult | ||
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NEXT |
END |