DTC P0472:00 [SKYACTIV-D 2.2]

id0102s4321600

DTC P0472:00

Exhaust gas pressure sensor No.1 circuit low input

DETECTION CONDITION

•  If the input voltage at the PCM terminal 1CE is less than 0.12 V for 5 s, the PCM determines that the exhaust gas pressure sensor No.1 circuit has a malfunction.

MONITORING CONDITIONS

―  Battery voltage: 8—20 V

―  0.5 s have elapsed after the ignition was switched ON (engine off or on)

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 (Mode 2)/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Inhibits the EGR control.

•  Inhibits engine-stop by operating the i-stop function.

•  PCM restricts engine-transaxle integration control.

POSSIBLE CAUSE

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

•  Short to ground in wiring harness between the following terminals:

―  Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ

―  Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE

•  PCM connector or terminals malfunction

•  Exhaust gas pressure sensor No.1 signal circuit and ground circuit are shorted to each other

•  Open circuit in wiring harness between the following terminals:

―  Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ

―  Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE

•  Exhaust gas pressure sensor No.1 malfunction

•  PCM malfunction

DTC P0472:00	Exhaust gas pressure sensor No.1 circuit low input
DETECTION CONDITION	• If the input voltage at the PCM terminal 1CE is less than 0.12 V for 5 s, the PCM determines that the exhaust gas pressure sensor No.1 circuit has a malfunction. MONITORING CONDITIONS ― Battery voltage: 8—20 V ― 0.5 s have elapsed after the ignition was switched ON (engine off or on) 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 (Mode 2)/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Inhibits the EGR control. • Inhibits engine-stop by operating the i-stop function. • PCM restricts engine-transaxle integration control.
POSSIBLE CAUSE	• Exhaust gas pressure sensor No.1 connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ ― Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE • PCM connector or terminals malfunction • Exhaust gas pressure sensor No.1 signal circuit and ground circuit are shorted to each other • Open circuit in wiring harness between the following terminals: ― Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ ― Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE • Exhaust gas pressure sensor No.1 malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then 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.
2		No	Go to the next step.
3	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 CONNECTOR CONDITION • Switch the ignition off. • Disconnect the exhaust gas pressure sensor No.1 connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
3		No	Go to the next step.
4	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 CIRCUIT FOR SHORT TO GROUND • Verify that the exhaust gas pressure sensor No.1 connector is disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Exhaust gas pressure sensor No.1 terminal C ― Exhaust gas pressure sensor No.1 terminal B • Is there continuity?	Yes	If the short to ground circuit could be detected in the wiring harness: • Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: ― Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ ― Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE If there is a common connector: ― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. ― Repair or replace the malfunctioning part. If there is no common connector: ― Repair or replace the wiring harness which has a short to ground. If the short to ground circuit could not be detected in the wiring harness: • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to Step 9.
4		No	Go to the next step.
5	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
5		No	Go to the next step.
6	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER • Verify that the exhaust gas pressure sensor No.1 and PCM connectors are disconnected. • Inspect for continuity between exhaust gas pressure sensor No.1 terminals B and A (wiring harness-side). • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE • Exhaust gas pressure sensor No.1 terminal A—PCM terminal 1CF If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to each other. Go to Step 9.
6		No	Go to the next step.
7	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 CIRCUIT FOR OPEN CIRCUIT • Verify that the exhaust gas pressure sensor No.1 and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ ― Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Exhaust gas pressure sensor No.1 terminal C—PCM terminal 1CJ • Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1CE If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 9.
8	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 • Reconnect all disconnected connectors. • Inspect the exhaust gas pressure sensor No.1. (See EXHAUST GAS PRESSURE SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the exhaust gas pressure sensor No.1, then go to the next step. (See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8		No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 2.2].) • Is the same 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.
9		No	Go to the next step.
10	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].)
10		No	DTC troubleshooting completed.