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HOMESERVICE MANUALSMAZDA2008TRIBUTE I SPORT, FWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEFUEL DELIVERYSYMPTOM TROUBLESHOOTING [ENGINE/FUEL - EXCEPT HYBRID]TEST 13: DIFFERENTIAL PRESSURE FEEDBACK EGR (DPFE) SENSOR
2008 Mazda Tribute i Sport, FWD, Standard

Test 13: Differential Pressure Feedback EGR (DPFE) Sensor

2008 Mazda Tribute i Sport, FWD, StandardSECTION Test 13: Differential Pressure Feedback EGR (DPFE) Sensor
TEST 13 - DIFFERENTIAL PRESSURE FEEDBACK EGR SENSOR

TEST 13 DIFFERENTIAL PRESSURE FEEDBACK EGR (DPFE) SENSOR
STEP INSPECTION ACTION
1 CHECK DPFEGR OUTPUT
  • Connect IDS or equivalent tester to DLC.
  • Warm up engine and run at idle.
  • Access DPFEGR PID and record value for the following:
    • Hot idle specification (0.25-1.3 V).
    • Driving 48 km/h (30 mph) specification (0.25-1.3 V).
    • Driving 88 km/h (55 mph) specification (0.25-4.5 V).
  • Are DPFEGR PID values as specified? 
 Yes DPFE sensor is OK.
No GO to the next step.
2 CHECK DPFEGR SENSOR OUTPUT BY APPLYING VACUUM WITH HAND PUMP
  • Key ON, engine OFF (KOEO).
  • Access DPFEGR PID on IDS 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 0.25 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 - 3.0L (4V) REMOVAL/ INSTALLATION .
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.