Egr ?

[Redbeard80]

I have the code saying I have Insufficient Exhaust Gas Return. I have checked the egr valve is fine diaphragm seems to be fine and a clean. So what would I check next? thanks

 

[bikerboy]

DPFE Sensor. Here's a test to run.

1. Start with checking the Differential Pressure Feedback EGR (DPFE) sensor voltage. This can be done on the scanner or at the DPFE sensor on the Brown/Light Green (BR/LG) wire. The voltage should be close to 1.0v Key On Engine Off (KOEO).
2. If the voltage is incorrect, verify that the Gray/Red (GR/RD) wire is a good ground and that the Brown/White (BR/WH) wire shows 5v. Also be sure the wires are good through the connector and that the connections are good between the pins in the harness connector and the pins of the DPFE sensor.
3. If the Key On Engine Off (KOEO) voltage is incorrect, but everything else looks OK, replace the DPFE sensor and retest.
4. If the voltage is OK, apply 8" vacuum to the "REF" port of the sensor (the smaller of the two ports) and the voltage should increase to at least 4v. If it does not, replace the sensor.

 

[McCormack]

DPFE Sensor.

X2

 

[04 EDGE]

DPFE Sensor. Here's a test to run.

1. Start with checking the Differential Pressure Feedback EGR (DPFE) sensor voltage. This can be done on the scanner or at the DPFE sensor on the Brown/Light Green (BR/LG) wire. The voltage should be close to 1.0v Key On Engine Off (KOEO).
2. If the voltage is incorrect, verify that the Gray/Red (GR/RD) wire is a good ground and that the Brown/White (BR/WH) wire shows 5v. Also be sure the wires are good through the connector and that the connections are good between the pins in the harness connector and the pins of the DPFE sensor.
3. If the Key On Engine Off (KOEO) voltage is incorrect, but everything else looks OK, replace the DPFE sensor and retest.
4. If the voltage is OK, apply 8" vacuum to the "REF" port of the sensor (the smaller of the two ports) and the voltage should increase to at least 4v. If it does not, replace the sensor.

this si correct but for the plastic sensor only.

the older aluminum sensor will read about .5 volts when the valve is closed.

 

[bikerboy]

this si correct but for the plastic sensor only.

the older aluminum sensor will read about .5 volts when the valve is closed.

You are correct. That line should have said you will get a reading between/around .5-1.2 volts. Thanks for catching the mistake!