DTC P0301:00, P0302:00, P0303:00, P0304:00 [SKYACTIV-D 2.2]

DTC P0301:00	Cylinder No.1 misfire detected
DTC P0302:00	Cylinder No.2 misfire detected
DTC P0303:00	Cylinder No.3 misfire detected
DTC P0304:00	Cylinder No.4 misfire detected
DETECTION CONDITION	• The misfire rate of specific cylinders for the crankshaft speed exceeds the specification for a continuous 16 s when the following conditions are met: MONITORING CONDITIONS ― Battery voltage: 8—20 V ― Engine speed: 1,200 rpm or less ― Fuel injection amount: 25 mm³/stroke or less ― Engine coolant temperature: above 60 °C {140 °F} ― Diesel particulate filter regeneration control is not performed Diagnostic support note • This is an intermittent monitor (misfire). • The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Restrict the shifting of the automatic transaxle.
POSSIBLE CAUSE	• Fuel shortage in fuel tank • Erratic signal to PCM ― ECT sensor No.1 signal malfunction ― IAT sensor No.1 signal malfunction ― MAF sensor signal malfunction ― CKP sensor signal malfunction ― CMP sensor signal malfunction ― APP sensor signal malfunction ― A/F sensor signal malfunction ― EGR valve position sensor signal malfunction ― VSS signal malfunction ― Related connector or terminals malfunction ― Related wiring harness malfunction • CMP sensor malfunction • Air suction or restriction in intake-air system (between MAF sensor and intake manifold) • MAF sensor malfunction • Turbocharger malfunction (turbine wheel and/or compressor wheel damaged, stuck) • CKP sensor malfunction • Fuel injector malfunction • Fuel system malfunction ― Fuel line restricted or leakage • Engine malfunction ― Insufficient engine compression ― Engine coolant leakage to combustion chamber • Poor fuel quality • PCM malfunction
SYSTEM WIRING DIAGRAM	Not applicable

• If the PCM detects consecutive misfire during engine idle condition, the misfire monitor determines a malfunction. When the difference between changes of a crankshaft angular velocity during 1 injection of the specific cylinder and average of the four cylinders reaches a threshold value, the PCM detects the misfire of the specified cylinder. The angular velocity is calculated using the CKP sensor signal. The CKP sensor outputs a signal to the PCM every 6 degree of crankshaft revolution. The PCM measures the time between 30 degree (5 inputs of CKP sensor) as an angular velocity to calculate the angular velocity. The PCM calculates the difference of the angular velocity of including top-dead-center and the angular velocity of including bottom-dead-center as change of angular velocity during 1 injection.

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MONITORING PARAMETER		DTC
Change of crankshaft angular velocity during 1 injection	Cylinder No.1	P0301:00
Change of crankshaft angular velocity during 1 injection	Cylinder No.2	P0302:00
Change of crankshaft angular velocity during 1 injection	Cylinder No.3	P0303:00
	Cylinder No.4	P0304:00
	Multiple misfire Example: If misfire occurs in cylinder No. 1 and cylinder No. 2	P0301:00 P0302:00

STEP	INSPECTION	ACTION
1	RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (misfire related) on the repair order.	—	Go to the next step.
2	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.
3	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 2.2].) • Is the PENDING CODE/DTC P115A:00, P0313:00 or P115B:00 also present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC P115A:00 [SKYACTIV-D 2.2].) (See DTC P0313:00 [SKYACTIV-D 2.2].) (See DTC P115B:00 [SKYACTIV-D 2.2].)
No	Go to the next step.
4	VERIFY CURRENT INPUT SIGNAL STATUS (KEY TO ON/IDLE) • Start the engine. • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) ― ECT ― IAT ― MAF ― RPM ― APP1 ― APP2 ― O2S11 ― EGRP ― VSS • Is there any signal that is far out of specification when the ignition is switched to ON and the engine idles? (See PCM INSPECTION [SKYACTIV-D 2.2].)	Yes	Inspect the suspected sensor and related wiring harness. Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
No	Go to the next step.
5	VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION 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. • Access the same PIDs as in Step 4 while simulating under the FREEZE FRAME DATA conditions. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is there any signal which causes drastic changes?	Yes	Inspect the suspected sensor and related wiring harness. Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
No	Go to the next step.
6	INSPECT CMP SENSOR • Inspect the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the CMP sensor, then go to Step 17. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No	Go to the next step.
7	VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR • Start the engine. • Access the MAF PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Verify that the MAF PID value changes quickly while increasing (racing) the engine rpm. • Is the MAF PID value normal? (See PCM INSPECTION [SKYACTIV-D 2.2].)	Yes	Go to Step 11.
No	Go to the next step.
8	INSPECT INTAKE AIR SYSTEM FOR EXCESSIVE AIR SUCTION • Visually inspect for loose, cracked or damaged hoses on intake air system. Note • Engine speed may change when rust penetrating agent is sprayed on the air suction area. • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
No	Go to the next step.
9	INSPECT FOR RESTRICTION OR CLOGGED IN INTAKE AIR SYSTEM • Verify if there is restriction or clogged into the intake air system (such as between MAF sensor and intake manifold). • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
No	Go to the next step.
10	INSPECT TURBOCHARGER • Inspect the turbocharger. (See TURBOCHARGER INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the turbocharger, then go to Step 17. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No	Replace the MAF sensor/IAT sensor No.1, then go to Step 17. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
11	INSPECT CKP SENSOR • Inspect the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the CKP sensor, then go to Step 17. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No	Go to the next step.
12	INSPECT FUEL INJECTOR OPERATION • Perform the Fuel Injector Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
No	Go to the next step.
13	INSPECT FOR LEAKAGE OR CLOGGED IN FUEL LINE • For the cylinder which outputs a DTC, 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 17.
No	Go to the next step.
14	INSPECT ENGINE COMPRESSION • Inspect the engine compression. (See COMPRESSION INSPECTION [SKYACTIV-D 2.2].) • Are compression pressures within specification? Specification: • Compression ― Standard: 2,255 kPa {22.99 kgf/cm², 327.1 psi} (180 rpm) ― Minimum: 1,804 kPa {18.40 kgf/cm², 261.6 psi} (180 rpm) ― Maximum difference between cylinders: 147 kPa {1.50 kgf/cm², 21.3 psi} (180 rpm)	Yes	Go to the next step.
No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
15	INSPECT SEALING OF ENGINE COOLANT PASSAGE • Perform the “ENGINE COOLANT LEAKAGE INSPECTION”. (See ENGINE COOLANT LEAKAGE INSPECTION [SKYACTIV-D 2.2].) • Does the radiator cap tester needle drop even though there is no engine coolant leakage from the radiator or the hoses?	Yes	Engine coolant leakage from the engine (between the combustion chamber and the engine coolant passage) may have occurred. • Verify the conditions of the gasket and the cylinder head. ― If there is any malfunction: • Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.
No	Go to the next step.
16	INSPECT FOR MALFUNCTION DUE TO POOR FUEL • Replace the fuel. (See FUEL DRAINING PROCEDURE [SKYACTIV-D 2.2].) • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 2.2].) • Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Start the engine and idle it. • Wait until the ECT PID value is above 60 °C {140 °F}. • Wait for 1 min (idle). • Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is the PENDING CODE for this DTC present?	Yes	Remove the accumulated matter in the cylinder head using the following procedure, then go to the next step. • Carbon remover • Overhauling
No	Advise the customer as to the change in the fuel used. Go to Step 18.
17	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 2.2].) • Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Start the engine and idle it. • Wait until the ECT PID value is above 60 °C {140 °F}. • Wait for 1 min (idle). • Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
No	Go to the next step.
18	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION

Note

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

• Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (misfire related) on the repair order.

—

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 2.2].)

• Is the PENDING CODE/DTC P115A:00, P0313:00 or P115B:00 also present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC P115A:00 [SKYACTIV-D 2.2].)

(See DTC P0313:00 [SKYACTIV-D 2.2].)

(See DTC P115B:00 [SKYACTIV-D 2.2].)

Go to the next step.

VERIFY CURRENT INPUT SIGNAL STATUS (KEY TO ON/IDLE)

• Start the engine.

• Access the following PIDs using the M-MDS:

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

― ECT

― IAT

― MAF

― RPM

― APP1

― APP2

― O2S11

― EGRP

― VSS

• Is there any signal that is far out of specification when the ignition is switched to ON and the engine idles?

(See PCM INSPECTION [SKYACTIV-D 2.2].)

Yes

Inspect the suspected sensor and related wiring harness.

Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

Go to the next step.

VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION

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.

• Access the same PIDs as in Step 4 while simulating under the FREEZE FRAME DATA conditions.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Is there any signal which causes drastic changes?

Yes

Inspect the suspected sensor and related wiring harness.

Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

Go to the next step.

INSPECT CMP SENSOR

• Inspect the CMP sensor.

(See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Replace the CMP sensor, then go to Step 17.

(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR

• Start the engine.

• Access the MAF PID using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Verify that the MAF PID value changes quickly while increasing (racing) the engine rpm.

• Is the MAF PID value normal?

(See PCM INSPECTION [SKYACTIV-D 2.2].)

Yes

Go to Step 11.

Go to the next step.

INSPECT INTAKE AIR SYSTEM FOR EXCESSIVE AIR SUCTION

• Visually inspect for loose, cracked or damaged hoses on intake air system.

Note

• Engine speed may change when rust penetrating agent is sprayed on the air suction area.

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

Go to the next step.

INSPECT FOR RESTRICTION OR CLOGGED IN INTAKE AIR SYSTEM

• Verify if there is restriction or clogged into the intake air system (such as between MAF sensor and intake manifold).

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

Go to the next step.

INSPECT TURBOCHARGER

• Inspect the turbocharger.

(See TURBOCHARGER INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Replace the turbocharger, then go to Step 17.

(See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Replace the MAF sensor/IAT sensor No.1, then go to Step 17.

(See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

INSPECT CKP SENSOR

• Inspect the CKP sensor.

(See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Replace the CKP sensor, then go to Step 17.

(See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

INSPECT FUEL INJECTOR OPERATION

• Perform the Fuel Injector Operation Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

Go to the next step.

INSPECT FOR LEAKAGE OR CLOGGED IN FUEL LINE

• For the cylinder which outputs a DTC, 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 17.

Go to the next step.

INSPECT ENGINE COMPRESSION

• Inspect the engine compression.

(See COMPRESSION INSPECTION [SKYACTIV-D 2.2].)

• Are compression pressures within specification?

Specification:

• Compression

― Standard: 2,255 kPa {22.99 kgf/cm², 327.1 psi} (180 rpm)

― Minimum: 1,804 kPa {18.40 kgf/cm², 261.6 psi} (180 rpm)

― Maximum difference between cylinders: 147 kPa {1.50 kgf/cm², 21.3 psi} (180 rpm)

Yes

Go to the next step.

Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

INSPECT SEALING OF ENGINE COOLANT PASSAGE

• Perform the “ENGINE COOLANT LEAKAGE INSPECTION”.

(See ENGINE COOLANT LEAKAGE INSPECTION [SKYACTIV-D 2.2].)

• Does the radiator cap tester needle drop even though there is no engine coolant leakage from the radiator or the hoses?

Yes

Engine coolant leakage from the engine (between the combustion chamber and the engine coolant passage) may have occurred.

• Verify the conditions of the gasket and the cylinder head.

― If there is any malfunction:

• Repair or replace the malfunctioning part according to the inspection results, then go to Step 17.

Go to the next step.

INSPECT FOR MALFUNCTION DUE TO POOR FUEL

• Replace the fuel.

(See FUEL DRAINING PROCEDURE [SKYACTIV-D 2.2].)

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

(See CLEARING DTC [SKYACTIV-D 2.2].)

• Access the ECT PID using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Start the engine and idle it.

• Wait until the ECT PID value is above 60 °C {140 °F}.

• Wait for 1 min (idle).

• Perform the Pending Trouble Code Access Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Is the PENDING CODE for this DTC present?

Yes

Remove the accumulated matter in the cylinder head using the following procedure, then go to the next step.

• Carbon remover

• Overhauling

Advise the customer as to the change in the fuel used.

Go to Step 18.

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 2.2].)

• Access the ECT PID using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Start the engine and idle it.

• Wait until the ECT PID value is above 60 °C {140 °F}.

• Wait for 1 min (idle).

• Perform the Pending Trouble Code Access Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Is the PENDING CODE for this DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-D 2.2].)

DTC troubleshooting completed.