Test 13: Differential Pressure Feedback EGR (DPFE) Sensor
DIFFERENTIAL PRESSURE FEEDBACK EGR (DPFE) SENSOR REFERENCE CHART
| TEST 13 |
DIFFERENTIAL PRESSURE FEEDBACK EGR (DPFE) SENSOR |
| STEP |
INSPECTION |
ACTION |
| 1 |
CHECK DPFEGR OUTPUT
- Connect WDS or equivalent tester to DLC.
- Warm up engine and run at idle.
- Access DPFEGR PID and record value for the following:
- Hot idle specification (0.2-1.3 V).
- Driving 48 kmh (30 mph) specification (0.2-1.3 V).
- Driving 88 kmh (55 mph) specification (0.2-4.5 V).
- Are DPFEGR PID values as specified?
|
Yes |
DPFE sensor is OK. |
| No |
Go to next step. |
| 2 |
CHECK DPFEGR SENSOR OUTPUT BY APPLYING VACUUM WITH HAND PUMP
- Key ON, Engine OFF (KOEO).
- Access DPFEGR PID on WDS or equivalent tester.
- Disconnect upstream and downstream hoses from sensor.
- Connect a hand vacuum pump to intake manifold side (downstream side = smaller diameter) of DPFE sensor.
- Apply vacuum and check PID.
- The DPFEGR PID voltage must be between 0.2 and 1.3 volt with the key on and no vacuum applied.
- The DPFEGR PID voltage must increase to greater than 4.0 volts with the vacuum applied.
- The DPFEGR PID must drop to less than 1.5 volts in less than 3 seconds when vacuum is released.
- Is PID at specification?
|
Yes |
DPFEGR sensor is OK.
CHECK vacuum line to intake manifold for kinks, clogging or restriction.
REPAIR or REPLACE as necessary. |
| No |
REPLACE DPFEGR sensor.
See
DIFFERENTIAL PRESSURE FEEDBACK EXHAUST GAS RECIRCULATION (EGR) SYSTEM - SENSOR
. |