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DTC P0471:00 [PCM (SKYACTIV-D)]

id0102t5212400

Outline

System malfunction location

Exhaust gas pressure sensor No.1 circuit range/performance problem

Detection condition

•  If the following condition A, B continues for 1.8 s.

Condition A

•  When the following conditions are met, the difference between the value detected by exhaust gas pressure sensor No.1 and the barometric pressure exceeds 55.8 kPa {0.57 kgf/cm², 8.1 psi} or more.

Condition B

•  Difference between the value detected by exhaust gas sensor No.1 and the value detected by MAP sensor exceeds 60.1 kPa {0.61 kgf/cm², 8.7 psi} or more.

Preconditions

•  Battery positive voltage: 10 V or more

•  7—9 s have elapsed after ignition is switched off

•  The following DTCs are not detected

―  Constant voltage power supply control system: P0652:00, P0653:00

―  MAP sensor: P0107:00, P0108:00

―  Exhaust gas pressure sensor No.1: P0472:00, P0473:00

―  BARO sensor: P2226:00, P2228:00, P2229:00

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

•  MAP sensor connector or terminal malfunction

•  PCM connector or terminal malfunction

•  Exhaust gas pressure sensor No.1 malfunction

•  MAP sensor malfunction

•  BARO sensor malfunction (integrated with PCM)

•  PCM malfunction

System wiring diagram

•  Not applicable

Connector diagram

•  Not applicable

System malfunction location	Exhaust gas pressure sensor No.1 circuit range/performance problem
Detection condition	• If the following condition A, B continues for 1.8 s. Condition A • When the following conditions are met, the difference between the value detected by exhaust gas pressure sensor No.1 and the barometric pressure exceeds 55.8 kPa {0.57 kgf/cm², 8.1 psi} or more. Condition B • Difference between the value detected by exhaust gas sensor No.1 and the value detected by MAP sensor exceeds 60.1 kPa {0.61 kgf/cm², 8.7 psi} or more. Preconditions • Battery positive voltage: 10 V or more • 7—9 s have elapsed after ignition is switched off • The following DTCs are not detected ― Constant voltage power supply control system: P0652:00, P0653:00 ― MAP sensor: P0107:00, P0108:00 ― Exhaust gas pressure sensor No.1: P0472:00, P0473:00 ― BARO sensor: P2226:00, P2228:00, P2229:00
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 • MAP sensor connector or terminal malfunction • PCM connector or terminal malfunction • Exhaust gas pressure sensor No.1 malfunction • MAP sensor malfunction • BARO sensor malfunction (integrated with PCM) • PCM malfunction
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

Diagnostic Procedure

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 MAP SENSOR 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 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].)

7

INSPECT MAP SENSOR FOR MALFUNCTION

•  Inspect the applicable part.
(See MANIFOLD ABSOLUTE PRESSURE (MAP) 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 MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/BOOST AIR TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

8

INSPECT BARO SENSOR FOR MALFUNCTION

•  Inspect the applicable part.
(See BAROMETRIC PRESSURE (BARO) 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 PCM 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.

―  Start the engine and warm it up.

―  Stop the vehicle, switch the ignition OFF, and wait for 20 s.

―  Switch the ignition ON (engine off).

•  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
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.
2		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.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT MAP SENSOR CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
4		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.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	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.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
7	INSPECT MAP SENSOR FOR MALFUNCTION • Inspect the applicable part. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/BOOST AIR TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
8	INSPECT BARO SENSOR FOR MALFUNCTION • Inspect the applicable part. (See BAROMETRIC PRESSURE (BARO) SENSOR INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See PCM 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. ― Start the engine and warm it up. ― Stop the vehicle, switch the ignition OFF, and wait for 20 s. ― Switch the ignition ON (engine off). • 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].)
Repair completion verification 1		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.
Repair completion verification 2		No	DTC troubleshooting completed.