DTC P0473:00 [SKYACTIV-D 1.5]

id0102q2331600

DTC P0473:00

Exhaust gas pressure sensor No.1 circuit high input

DETECTION CONDITION

•  If the input voltage at the PCM terminal 1X is more than 4.81 V for 5 s, the PCM determines that the exhaust gas pressure sensor No.1 circuit has a malfunction.

MONITORING CONDITIONS

―  Battery voltage: 8 V or more

―  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/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  PCM restricts engine torque.

•  Inhibits the EGR control.

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

POSSIBLE CAUSE

•  Turbocharger malfunction

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

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between exhaust gas pressure sensor No.1 terminal B and PCM terminal 1X

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

•  Open circuit in wiring harness between exhaust gas pressure sensor No.1 terminal C and PCM terminal 1CF

•  Exhaust gas pressure sensor No.1 malfunction

•  PCM malfunction

DTC P0473:00	Exhaust gas pressure sensor No.1 circuit high input
DETECTION CONDITION	• If the input voltage at the PCM terminal 1X is more than 4.81 V for 5 s, the PCM determines that the exhaust gas pressure sensor No.1 circuit has a malfunction. MONITORING CONDITIONS ― Battery voltage: 8 V or more ― 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/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• PCM restricts engine torque. • Inhibits the EGR control. • PCM restricts engine-transaxle integration control. (ATX)
POSSIBLE CAUSE	• Turbocharger malfunction • Exhaust gas pressure sensor No.1 connector or terminals malfunction • PCM connector or terminals malfunction • Short to power supply in wiring harness between exhaust gas pressure sensor No.1 terminal B and PCM terminal 1X • Exhaust gas pressure sensor No.1 power supply circuit and signal circuit are shorted to each other • Open circuit in wiring harness between exhaust gas pressure sensor No.1 terminal C and PCM terminal 1CF • Exhaust gas pressure sensor No.1 malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION 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 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.
2		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 1.5].) • Are any other PENDING CODEs and/or DTCs present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
3		No	Go to the next step.
4	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 10.
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 10.
5		No	Go to the next step.
6	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the exhaust gas pressure sensor No.1 and PCM connectors are disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the exhaust gas pressure sensor No.1 terminal B (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between exhaust gas pressure sensor No.1 terminal B and PCM terminal 1X. 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 power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 10.
7	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER • Verify that the exhaust gas pressure sensor No.1 and PCM connectors are disconnected. • Switch the ignition off. • Inspect for continuity between exhaust gas pressure sensor No.1 terminals A and B (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 A—PCM terminal 1CJ • Exhaust gas pressure sensor No.1 terminal B—PCM terminal 1X 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 10.
7		No	Go to the next step.
8	INSPECT EXHAUST GAS PRESSURE SENSOR NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the exhaust gas pressure sensor No.1 and PCM connectors are disconnected. • Inspect for continuity between exhaust gas pressure sensor No.1 terminal C (wiring harness-side) and PCM terminal 1CF (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between exhaust gas pressure sensor No.1 terminal C and 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 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 10.
9	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 1.5].) • 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 1.5].)
9		No	Go to the next step.
10	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 1.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 1.5].) • 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 1.5].) Go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
11		No	DTC troubleshooting completed.