DTC P0470:00 [PCM (SKYACTIV-D)]

System malfunction location	Exhaust gas pressure sensor No.1 circuit problem
Detection condition	• The PCM detects a condition 4 times in which the difference between the maximum exhaust air pressure when the following condition A is met and the minimum exhaust air pressure when the following condition B is met is less than 16 kPa{0.16 kgf/cm², 2.3 psi}. Condition A ― 0.32 s or more have elapsed with all of the following conditions met: • Battery positive voltage: 8 V or more • 0.5 s have elapsed after ignition is switched ON (engine off or on) • Engine coolant temperature: 55 °C {131°F} or more • Intake air temperature: -10 °C {14°F} or more • Barometric pressure: 65—120 kPa{0.67—1.22 kgf/cm², 9.5—17.4 psi} • Change in fuel injection amount: 4 mm³/st or less within 0.032 s • Vehicle speed: 60 km/h {37 mph} or more • Target intake air pressure is 150 kPa {1.53 kgf/cm², 21.8 psi} or more for 1.5 s or more • Difference in fuel injection amount before and after correction is 5 mm³/st or less • MAP sensor: P0472:00 and P0473:00 are not detected Condition B ― 0.5 s or more have elapsed with all of the following conditions met: • Battery positive voltage: 8 V or more • 0.5 s have elapsed after ignition is switched ON (engine off or on) • Engine coolant temperature: 55 °C {131°F} or more • Intake air temperature: -10 °C {14°F} or more • Barometric pressure: 65—120 kPa{0.67—1.22 kgf/cm², 9.5—17.4 psi} • Change in fuel injection amount: 4 mm³/st or less within 0.032 s • Engine speed: 1,200 rpm or less • Idle speed control: Being performed • Fuel injection amount: 25 mm³/st or less • MAP sensor: P0472:00 and P0473:00 are not detected • Vehicle speed is 0 km/h {0 mph} or selector lever is in P or N position
Fail-safe	• PCM restricts engine torque. • Inhibits the DENOx/DESOx control. • Inhibits the diesel particulate filter regeneration control. • Inhibits the EGR control. • PCM restricts engine-transaxle integration control. (ATX)
Possible cause	• Exhaust gas pressure sensor No.1 connector or terminal malfunction • Exhaust gas pressure sensor No.1 malfunction • PCM connector or terminal malfunction • PCM malfunction
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

System malfunction location

Exhaust gas pressure sensor No.1 circuit problem

Detection condition

• The PCM detects a condition 4 times in which the difference between the maximum exhaust air pressure when the following condition A is met and the minimum exhaust air pressure when the following condition B is met is less than 16 kPa{0.16 kgf/cm², 2.3 psi}.

Condition A

― 0.32 s or more have elapsed with all of the following conditions met:

• Battery positive voltage: 8 V or more

• 0.5 s have elapsed after ignition is switched ON (engine off or on)

• Engine coolant temperature: 55 °C {131°F} or more

• Intake air temperature: -10 °C {14°F} or more

• Barometric pressure: 65—120 kPa{0.67—1.22 kgf/cm², 9.5—17.4 psi}

• Change in fuel injection amount: 4 mm³/st or less within 0.032 s

• Vehicle speed: 60 km/h {37 mph} or more

• Target intake air pressure is 150 kPa {1.53 kgf/cm², 21.8 psi} or more for 1.5 s or more

• Difference in fuel injection amount before and after correction is 5 mm³/st or less

• MAP sensor: P0472:00 and P0473:00 are not detected

Condition B

― 0.5 s or more have elapsed with all of the following conditions met:

• Battery positive voltage: 8 V or more

• 0.5 s have elapsed after ignition is switched ON (engine off or on)

• Engine coolant temperature: 55 °C {131°F} or more

• Intake air temperature: -10 °C {14°F} or more

• Barometric pressure: 65—120 kPa{0.67—1.22 kgf/cm², 9.5—17.4 psi}

• Change in fuel injection amount: 4 mm³/st or less within 0.032 s

• Engine speed: 1,200 rpm or less

• Idle speed control: Being performed

• Fuel injection amount: 25 mm³/st or less

• MAP sensor: P0472:00 and P0473:00 are not detected

• Vehicle speed is 0 km/h {0 mph} or selector lever is in P or N position

Fail-safe

• PCM restricts engine torque.

• Inhibits the DENOx/DESOx control.

• Inhibits the diesel particulate filter regeneration control.

• Inhibits the EGR control.

• PCM restricts engine-transaxle integration control. (ATX)

Possible cause

• Exhaust gas pressure sensor No.1 connector or terminal malfunction

• Exhaust gas pressure sensor No.1 malfunction

• PCM connector or terminal malfunction

• PCM malfunction

System wiring diagram

• Not applicable

Connector diagram

• Not applicable

Step	Inspection	Results	Action
1	PURPOSE: 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	PURPOSE: 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 EXHAUST GAS PRESSURE SENSOR No.1 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.
4	INSPECT EXHAUST GAS PRESSURE SENSOR No.1 FOR MALFUNCTION • Inspect the applicable part. (See EXHAUST GAS 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 EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
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.
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. ― Start the engine and warm it up. ― Drive the vehicle on flat roads under the following conditions 4 times repeatedly. 1. Accelerate within 20 s to 70 km/h {43 mph}. 2. After the engine is started, idle the engine for 10 s. ― Stop the vehicle. • 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

PURPOSE: 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.

PURPOSE: 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 EXHAUST GAS PRESSURE SENSOR No.1 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 EXHAUST GAS PRESSURE SENSOR No.1 FOR MALFUNCTION

• Inspect the applicable part.

(See EXHAUST GAS 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 EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

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.

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.

― Start the engine and warm it up.

― Drive the vehicle on flat roads under the following conditions 4 times repeatedly.

1. Accelerate within 20 s to 70 km/h {43 mph}.

2. After the engine is started, idle the engine for 10 s.

― Stop the vehicle.

• 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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