DTC P0301:00, P0302:00, P0303:00, P0304:00 [SKYACTIV-D 1.5]

DTC P0301:00 DTC P0302:00 DTC P0303:00 DTC P0304:00	P0301:00: Cylinder No.1 misfire P0302:00: Cylinder No.2 misfire P0303:00: Cylinder No.3 misfire P0304:00: Cylinder No.4 misfire
DETECTION CONDITION	• The misfire rate of specific cylinders relative to the crankshaft speed exceeds the specified value continuously for a specified period of time when all of the following conditions are met. ― There is a record of driving the vehicle with all of the following conditions met. • Deceleration with accelerator pedal released from engine speed of 1,500 rpm (from engine speed at deceleration start to 1,150 rpm) • Fuel injection amount control: during fuel cut • Speed ratio fluctuation or time fluctuation for each cylinder is specified value or less ― Fuel injection pattern or A/C relay operation condition is not switched directly before. ― Post injection is not being performed during deceleration and no load ― Gear is not being shifted ― Change in accelerator opening angle is specified value or less ― Speed ratio fluctuation for each cylinder is specified value or less ― Fuel injection amount is specified value or more ― Engine coolant temperature: 30 °C {86 °F} or more Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Inhibits the automatic diesel particulate filter regeneration control. • Inhibits the compulsory diesel particulate filter regeneration control. • Inhibits the EGR control.
POSSIBLE CAUSE	• Out of fuel • Inferior fuel added • Leakage from fuel system • Fuel injector malfunction • Poor engine compression • Air suction or clogging into intake air system (between airflow sensor and intake manifold) • Crankshaft position sensor malfunction • Crankshaft plate damage • PCM malfunction

DTC P0301:00

DTC P0302:00

DTC P0303:00

DTC P0304:00

P0301:00: Cylinder No.1 misfire

P0302:00: Cylinder No.2 misfire

P0303:00: Cylinder No.3 misfire

P0304:00: Cylinder No.4 misfire

DETECTION CONDITION

• The misfire rate of specific cylinders relative to the crankshaft speed exceeds the specified value continuously for a specified period of time when all of the following conditions are met.

― There is a record of driving the vehicle with all of the following conditions met.

• Deceleration with accelerator pedal released from engine speed of 1,500 rpm (from engine speed at deceleration start to 1,150 rpm)

• Fuel injection amount control: during fuel cut

• Speed ratio fluctuation or time fluctuation for each cylinder is specified value or less

― Fuel injection pattern or A/C relay operation condition is not switched directly before.

― Post injection is not being performed during deceleration and no load

― Gear is not being shifted

― Change in accelerator opening angle is specified value or less

― Speed ratio fluctuation for each cylinder is specified value or less

― Fuel injection amount is specified value or more

― Engine coolant temperature: 30 °C {86 °F} or more

Diagnostic support note

• This is a continuous monitor (CCM).

• The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA/Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

• Inhibits the automatic diesel particulate filter regeneration control.

• Inhibits the compulsory diesel particulate filter regeneration control.

• Inhibits the EGR control.

POSSIBLE CAUSE

• Out of fuel

• Inferior fuel added

• Leakage from fuel system

• Fuel injector malfunction

• Poor engine compression

• Air suction or clogging into intake air system (between airflow sensor and intake manifold)

• Crankshaft position sensor malfunction

• Crankshaft plate damage

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY DTC CAUSING FREEZE FRAME DATA • Is DTC P0301:00, P0302:00, P0303:00, or P0304:00 causing the freeze frame data?	Yes	Go to the next step.
No	Inspect the DTC causing the freeze frame data. (See DTC TABLE [SKYACTIV-D 1.5].)
2	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the freeze frame data/snap shot data.	—	Go to the next step.
3	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
4	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition off, then ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting first, then go to the next step. (See DTC TABLE [SKYACTIV-D 1.5].)
No	Go to the next step.
5	INSPECT FOR FUEL LEAKAGE FROM FUEL LINE OR CLOGGING • Inspect the following fuel line for fuel leakage or clogging. ― Between supply pump and common rail ― Between common rail and fuel injector • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
No	Go to the next step.
6	VERIFY RELATED SENSOR INPUT SIGNAL • Start the engine and warm it up completely. • Access the following PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) ― ECT ― IAT ― MAF ― RPM ― APP ― VSS ― FRP • Are the monitoring values normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location, then go to Step 10.
7	VERIFY INPUT SIGNAL FROM RELATED SENSOR WHILE DRIVING UNDER LOAD • Start the engine and warm it up completely. • Drive the vehicle under the condition of the freeze frame data (mode 2) recorded in Step 2 and display the following PIDs using the M-MDS under this condition. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) ― ECT ― IAT ― MAF ― RPM ― APP ― VSS ― FRP • Are the monitoring values normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location, then go to Step 10.
8	INSPECT FUEL INJECTORS NO.1 TO NO.4 • Inspect fuel injectors No.1 to No.4. (See FUEL INJECTOR INSPECTION [SKYACTIV-D 1.5].) • Are the fuel injectors normal?	Yes	Go to the next step.
No	Replace the malfunctioning fuel injector, then go to Step 10. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
9	INSPECT ENGINE COMPRESSION • Inspect the engine compression. (See COMPRESSION INSPECTION [SKYACTIV-D 1.5].) • Is the engine compression normal?	Yes	Replace the fuel injector in all of the cylinders, then go to to the next step. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)
No	Repair or replace the malfunctioning location, then go to the next step.
10	PERFORM FUEL INJECTOR CARBON DEPOSIT BURN-OFF PROCEDURE Note • Carbon on the exhaust valve is removed by performing the fuel injector carbon deposit burn-off procedure. • Perform the "FUEL INJECTOR CARBON DEPOSIT BURN-OFF PROCEDURE". (See FUEL INJECTOR CARBON DEPOSIT BURN-OFF PROCEDURE [SKYACTIV-D 1.5].) • Is the fuel injector carbon deposit burn-off completed?	Yes	Go to Step 12.
No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present? Note • If the fuel injector carbon deposit burn-off procedure was not successful, DTC P1284:00 is stored.	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting, then go to the next step. (See DTC TABLE [SKYACTIV-D 1.5].)
No	Go to the next step.
12	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Start the engine and warm it up completely. Caution • While performing this step, always operate the vehicle in a safe and lawful manner. • When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. • Drive the vehicle under the FREEZE FRAME DATA/snapshot data condition. • Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) • Has DTC P0301:00, P0302:00, P0303:00, or P0304:00 been stored?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM, then go to the next step. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)
No	Go to the next step.
13	VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY DTC CAUSING FREEZE FRAME DATA

• Is DTC P0301:00, P0302:00, P0303:00, or P0304:00 causing the freeze frame data?

Yes

Go to the next step.

Inspect the DTC causing the freeze frame data.

(See DTC TABLE [SKYACTIV-D 1.5].)

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

Note

• Recording can be facilitated using the screen capture function of the PC.

• Record the freeze frame data/snap shot data.

—

Go to the next step.

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related Service Information available?

Yes

Perform repair or diagnosis according to the available Service Information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

VERIFY RELATED PENDING CODE AND/OR DTC

• Switch the ignition off, then ON (engine off).

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

• Are any DTCs present?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting first, then go to the next step.

(See DTC TABLE [SKYACTIV-D 1.5].)

Go to the next step.

INSPECT FOR FUEL LEAKAGE FROM FUEL LINE OR CLOGGING

• Inspect the following fuel line for fuel leakage or clogging.

― Between supply pump and common rail

― Between common rail and fuel injector

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

Go to the next step.

VERIFY RELATED SENSOR INPUT SIGNAL

• Start the engine and warm it up completely.

• Access the following PIDs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

― ECT

― IAT

― MAF

― RPM

― APP

― VSS

― FRP

• Are the monitoring values normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location, then go to Step 10.

VERIFY INPUT SIGNAL FROM RELATED SENSOR WHILE DRIVING UNDER LOAD

• Start the engine and warm it up completely.

• Drive the vehicle under the condition of the freeze frame data (mode 2) recorded in Step 2 and display the following PIDs using the M-MDS under this condition.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

― ECT

― IAT

― MAF

― RPM

― APP

― VSS

― FRP

• Are the monitoring values normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location, then go to Step 10.

INSPECT FUEL INJECTORS NO.1 TO NO.4

• Inspect fuel injectors No.1 to No.4.

(See FUEL INJECTOR INSPECTION [SKYACTIV-D 1.5].)

• Are the fuel injectors normal?

Yes

Go to the next step.

Replace the malfunctioning fuel injector, then go to Step 10.

(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

INSPECT ENGINE COMPRESSION

• Inspect the engine compression.

(See COMPRESSION INSPECTION [SKYACTIV-D 1.5].)

• Is the engine compression normal?

Yes

Replace the fuel injector in all of the cylinders, then go to to the next step.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

Repair or replace the malfunctioning location, then go to the next step.

PERFORM FUEL INJECTOR CARBON DEPOSIT BURN-OFF PROCEDURE

Note

• Carbon on the exhaust valve is removed by performing the fuel injector carbon deposit burn-off procedure.

• Perform the "FUEL INJECTOR CARBON DEPOSIT BURN-OFF PROCEDURE".

(See FUEL INJECTOR CARBON DEPOSIT BURN-OFF PROCEDURE [SKYACTIV-D 1.5].)

• Is the fuel injector carbon deposit burn-off completed?

Yes

Go to Step 12.

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the "AFTER REPAIR PROCEDURE".

(See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].)

• Are any DTCs present?

Note

• If the fuel injector carbon deposit burn-off procedure was not successful, DTC P1284:00 is stored.

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting, then go to the next step.

(See DTC TABLE [SKYACTIV-D 1.5].)

Go to the next step.

VERIFY DTC TROUBLESHOOTING COMPLETED

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

(See CLEARING DTC [SKYACTIV-D 1.5].)

• Start the engine and warm it up completely.

Caution

• While performing this step, always operate the vehicle in a safe and lawful manner.

• When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.

• Drive the vehicle under the FREEZE FRAME DATA/snapshot data condition.

• Perform the DTC Reading Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

• Has DTC P0301:00, P0302:00, P0303:00, or P0304:00 been stored?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM, then go to the next step.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the "AFTER REPAIR PROCEDURE".

(See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-D 1.5].)

DTC troubleshooting completed.