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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Engine Controls [Self-Diagnostics 3.0L]) >> Diagnostic Tests >> DTC P2227: EGR Boost Sensor Circuit - Performance Problem >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. If FREEZE FRAME DATA has been recorded, go to next step. If FREEZE FRAME DATA has not been recorded, record FREEZE FRAME DATA. Go to next step.
  2. Verify Related Repair Information Availability -  Check for related Service Bulletins and/or on-line repair information availability. If any related repair information is available, perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to next step. If related repair information is not available, go to next step.
  3. Verify Related Pending Code Or Stored DTCs -  Turn ignition off, then on (engine off). Verify pending code or stored DTCs using WDS or equivalent. If no other DTCs are present, go to next step. If any DTC is present, go to appropriate DTC trouble shooting procedure. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  4. Identify Trigger DTC For FREEZE FRAME DATA -  If only DTC P2227 is on FREEZE FRAME DATA, go to next step. If any other DTC triggered FREEZE FRAME DATA, go to appropriate trouble shooting procedure for DTC that triggered FREEZE FRAME DATA. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  5. Inspect Connection Of EGR Boost Sensing Related Vacuum Hoses -  Inspect following vacuum hoses for loose, damage, improper connection and clogging.
    • From EGR boost sensor to EGR boost sensor solenoid valve
    • From EGR boost sensor solenoid valve to EGR pipe.
    If vacuum hoses and connections are okay, go to next step. If any problem is found with vacuum hoses, repair as necessary or replace vacuum hose. After repair, go to step  9.
  6. Inspect EGR Boost Sensor Solenoid Valve Air Filter For Clog -  If EGR boost sensor solenoid valve air filer is okay, go to next step. If EGR boost sensor solenoid valve air filter is clogged, repair clog as necessary. After repair, go to step  9.
  7. Inspect EGR Boost Sensor Solenoid Valve -  Inspect EGR boost sensor solenoid valve. Refer to EGR BOOST SENSOR SOLENOID VALVE under RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If EGR boost sensor solenoid valve is okay, go to next step. If EGR boost sensor solenoid valve is faulty, replace EGR boost sensor solenoid valve. After repair, go to step  9.
  8. Inspect EGR Boost Sensor -  Inspect EGR boost sensor. Refer to EGR BOOST SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If EGR boost sensor is okay, go to next step. If EGR boost sensor is faulty, replace EGR boost sensor. After repair, go to next step.
  9. Verify Trouble Shooting Of DTC P2227 Is Completed -  Make sure to reconnect all disconnected connectors. Turn ignition on, engine off. Clear DTC from PCM memory using WDS or equivalent. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Run MODE 1 - PCM ADAPTIVE MEMORY PRODUCE DRIVE MODE , MODE 2 - EGR SYSTEM REPAIR VERIFICATION DRIVE MODE  and MODE 3 - HO2S HEATER, HO2S & TWC REPAIR VERIFICATION DRIVE MODE  . Stop vehicle. If same DTC is not present, go to next step. If same DTC is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article. After repair, go to next step.
  10. Verify After Repair Procedure -  Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If any DTCs are present, go to appropriate DTC inspection. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.
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