DTC Code | DTC Name |
---|---|
P0405 | Exhaust Gas Recirculation Sensor "A" Circuit Low |
P0406 | Exhaust Gas Recirculation Sensor "A" Circuit High |
DESCRIPTION
The EGR valve position sensor is mounted on the EGR valve and is used for detecting the lift amount of the valve. The lift amount detected by the sensor is provided to the ECM as feedback. The ECM then regulates the lift amount of the valve in accordance with engine running conditions.
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON for 5 seconds | EGR valve position sensor output voltage is below 0.1 V for more than 5 seconds (1 trip detection logic). |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON for 5 seconds | EGR valve position sensor output voltage is more than 4.9 V for higher than 5 seconds (1 trip detection logic). |
|
MONITOR DESCRIPTION
When the output voltage of the EGR valve position sensor deviates from the normal operating range of 0.1 to 4.9 V for more than 5 seconds, the ECM interprets this as a malfunction of the sensor circuit and illuminates the MIL.
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
After replacing the ECM, the new ECM needs registration Click here and initialization Click here.
Tech Tips
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 TERMINAL VOLTAGE (EGR VALVE POSITION SENSOR CONNECTOR)
*a | Front view of wire harness connector (to EGR Valve Position Sensor) |
Disconnect the EGR valve position sensor connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Reconnect the electric vacuum regulating valve assembly connector.
NG |
CHECK HARNESS AND CONNECTOR (EGR VALVE POSITION SENSOR - ECM) Click here |
OK |
INSPECT EGR VALVE POSITION SENSOR
Inspect the EGR valve position sensor Click here.
NG |
REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY Click here |
OK |
CHECK HARNESS AND CONNECTOR (EGR VALVE POSITION SENSOR - ECM)
Disconnect the EGR valve position sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Reconnect the electric vacuum regulating valve assembly connector.
Reconnect the ECM connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR Click here |
OK |
REPLACE ECM
Replace the ECM Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY
Replace the electric EGR control valve assembly 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.
Clear the DTCs Click here.
Turn the ignition switch to ON for 5 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Confirm that the DTC is not output again.
NEXT |
END