DTC P01C6:00 [PCM (SKYACTIV-D)]

System malfunction location	Fuel pressure sensor (integrated with fuel injector No.4) circuit high input
Detection condition	• With the following conditions met, the fuel pressure sensor output voltage is 4.15 V or more for a continuous 0.7 s. ― Battery positive voltage: 8.0 V or more ― Specified time has elapsed after ignition is switched ON (engine off or on)
Fail-safe	• Not applicable
Possible cause	• Fuel injector No.4 connector or terminal malfunction • PCM connector or terminal malfunction • Short to power supply in fuel pressure sensor (integrated with fuel injector No.4) signal circuit • Short circuit in fuel pressure sensor (integrated with fuel injector No.4) power supply circuit and signal circuit • Open circuit in any of the following fuel pressure sensor (integrated with fuel injector No.4) circuits. ― Signal circuit ― Ground circuit • Fuel injector No.4 malfunction • PCM malfunction

System malfunction location

Fuel pressure sensor (integrated with fuel injector No.4) circuit high input

Detection condition

• With the following conditions met, the fuel pressure sensor output voltage is 4.15 V or more for a continuous 0.7 s.

― Battery positive voltage: 8.0 V or more

― Specified time has elapsed after ignition is switched ON (engine off or on)

Fail-safe

• Not applicable

Possible cause

• Fuel injector No.4 connector or terminal malfunction

• PCM connector or terminal malfunction

• Short to power supply in fuel pressure sensor (integrated with fuel injector No.4) signal circuit

• Short circuit in fuel pressure sensor (integrated with fuel injector No.4) power supply circuit and signal circuit

• Open circuit in any of the following fuel pressure sensor (integrated with fuel injector No.4) circuits.

― Signal circuit

― Ground circuit

• Fuel injector No.4 malfunction

• PCM malfunction

• If a hand or tool touches the fuel injector terminal, the fuel injector might be damaged. To prevent this, do not touch the terminal.

• If high-voltage generating parts or components and electronic devices come near a fuel injector, the fuel injector could be damaged. To prevent damage to a fuel injector, always keep high-voltage generating parts or components and electronic devices away from it.

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	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 FOR OTHER RELATED DTCs • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D)].)
No	Go to the next step.
4	INSPECT FUEL INJECTOR No.4 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 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.
6	INSPECT FUEL INJECTOR No.4 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT FUEL INJECTOR No.4 POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT CIRCUIT • Inspect the applicable circuits for a short circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to repair completion verification.
No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	INSPECT FUEL INJECTOR No.4 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification.
9	INSPECT FUEL PRESSURE SENSOR FOR MALFUNCTION (INTEGRATED WITH FUEL injector No.4) • Inspect the applicable part. (See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.8]) • Is the part normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8])
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. ― Switch the ignition ON (engine off) and leave for 1 min. ― Start the engine and wait for 1 min. • 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. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) 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. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
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.

Step

Inspection

Results

Action

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

• Record the freeze frame data/snapshot data.

Note

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

—

Go to the next step.

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.

Go to the next step.

INSPECT FOR OTHER RELATED DTCs

• Perform the DTC inspection for the PCM.

(See DTC INSPECTION.)

• Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

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

Go to the next step.

INSPECT FUEL INJECTOR No.4 CONNECTOR FOR MALFUNCTION

• Inspect the applicable connector and terminal.

(See CONNECTOR INSPECTION.)

• Are the connector and terminal normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

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.

Repair or replace the malfunctioning location and perform the repair completion verification.

INSPECT FUEL INJECTOR No.4 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

• Inspect the applicable circuit for a short to power supply.

(See CIRCUIT INSPECTION.)

• Is the circuit normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

INSPECT FUEL INJECTOR No.4 POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT CIRCUIT

• Inspect the applicable circuits for a short circuit.

(See CIRCUIT INSPECTION.)

• Is the circuit normal?

Yes

Go to repair completion verification.

Repair or replace the malfunctioning location and perform the repair completion verification.

INSPECT FUEL INJECTOR No.4 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR OPEN CIRCUIT

• Inspect the applicable circuit for open circuit.

(See CIRCUIT INSPECTION.)

• Is the circuit normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

INSPECT FUEL PRESSURE SENSOR FOR MALFUNCTION (INTEGRATED WITH FUEL injector No.4)

• Inspect the applicable part.

(See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.8])

• Is the part normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8])

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.

― Switch the ignition ON (engine off) and leave for 1 min.

― Start the engine and wait for 1 min.

• 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.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

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.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

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.

DTC troubleshooting completed.

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