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MULTIPORT FUEL INJECTION (MPI) DIAG MULTIPORT FUEL INJECTION (MPI) 13A-452 DTC P2099: Post Catalyst System too Rich (bank 2) . TECHNICAL DESCRIPTION • The signal from the rear heated oxygen sensor differs from the front heated oxygen sensor. That • The ECU compares the output of the front and rear heated oxygen sensor signals. . DTC SET CONDITIONS Check Conditions • None. Judgment Criteria • Oxygen sensor slow response. • MIL activated after 2 drive cycles. • No Limp home. . EOBD DRIVE CYCLE PATTERN Refer to Diagnostic Function − EOBD Drive Cycle − . TROUBLESHOOTING HINTS (The most • Left bank heated oxygen sensor deterio- rated/failed. • Left bank side catalytic converter deteriorated. • Exhaust leak. • Refer to component locations GROUP- • Refer to configuration diagrams GROUP- • Refer to circuit diagrams GROUP- DIAGNOSIS Required Special Tools: • Diagnostic tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A STEP 1. Check for exhaust leak. Q: Are there any abnormalities? YES : Repair it. Then go to Step 4. |