DTC Code | DTC Name |
---|---|
P0471 | Exhaust Pressure Sensor "A" Circuit Range / Performance |
P0472 | Exhaust Pressure Sensor "A" Circuit Low |
P0473 | Exhaust Pressure Sensor "A" Circuit High |
DESCRIPTION
The exhaust gas pressure sensor is fixed to the engine by a holder to protect it from high temperatures.
The exhaust gas pressure sensor is connected to the exhaust manifold via a hose and pipe, and detects the exhaust gas pressure before exhaust turbocharger.
The exhaust gas pressure sensor is supplied with 5 V from the ECM and has a measurement range between 100 kPa (1.01 bar) to 500 kPa (5.1 bar). This is equivalent to 1.0 to 4.5 V.
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
P0471 | Either condition is met (3 trip detection logic):
Tech Tips The difference of the standard pressure value (turbo pressure and ambient pressure) is 60 mbar (6 kPa) or less. |
|
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
P0472 | Exhaust gas pressure sensor output voltage is 0.2 V or less. (3 trip detection logic) |
|
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
P0473 | Exhaust gas pressure sensor output voltage is 4.9 V or more. (3 trip detection logic) |
|
DTC No. | Data List |
---|---|
P0471 P0472 P0473 |
Sensed Value of the Pressure at TrbnUs Absolute Turbine Upstream Pressure |
WIRING DIAGRAM
*a | VCPE |
*b | PEXM |
*c | EPEM |
*d | Exhaust Gas Pressure Sensor |
CAUTION / NOTICE / HINT
Note
When replacing the ECM, the ECM needs Registration and Initialization Click here.
Tech Tips
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
CHECK HARNESS AND CONNECTOR (EXHAUST GAS PRESSURE SENSOR - ECM)
Disconnect the exhaust gas pressure sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR Click here |
OK |
CHECK HARNESS AND CONNECTOR (VC VOLTAGE)
*a | Front view of wire harness connector (to exhaust gas pressure sensor) |
Disconnect the exhaust gas pressure sensor connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE ECM Click here |
OK |
REPLACE EXHAUST GAS PRESSURE SENSOR
Replace the exhaust gas pressure sensor Click here.
NEXT |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0471, P0472 or P0473)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs Click here.
Turn the ignition switch off and wait for 60 seconds or more [A].
Perform road test [B].
Repeat [A] and [B] for the number of trips detected.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Result | Proceed to |
---|---|
No DTC output | A |
DTC P0471, P0472 or P0473 | B |
A |
END |
B |
REPLACE ECM
Replace the ECM Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs Click here.
Turn the ignition switch off and wait for 60 seconds or more [A].
Perform road test [B].
Repeat [A] and [B] for the number of trips detected.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Confirm that the DTC is not output again.
NEXT |
END |