Emission Systems & Sub-Systems: EGR: Notes

Faults in Secondary Air Injection (AIR) system should set a Diagnostic Trouble Code (DTC). See QUICK TEST in SELF-DIAGNOSTICS - B2300, B2500, B3000, B4000 & TRIBUTE article. If any DTCs are present, perform appropriate system test. If no DTCs are present, check AIR system. See TEST HM under SYSTEM TESTS in SELF-DIAGNOSTICS - B2300, B2500, B3000, B4000 & TRIBUTE article.