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Home › Mazda › 2007 › CX-9 Sport, 3.5 C, FWD › Repair and Diagnosis › Engine Performance › System › On-Board Diagnostic [Engine Control System MZI-3.5) › DTC P2270, P2272 › Notes

DTC P2270, P2272: Notes

DTC P2270, P2272 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2270 P2270: Rear HO2S (RH) signal stuck lean
DTC P2272 P2272: Rear HO2S (LH) signal stuck lean
DETECTION CONDITION 
  • The downstream HO2S is forced rich and monitored by the PCM. The lest fails if the PCM does not detect the output of the HO2S in a calibrated amount of time
POSSIBLE CAUSE 
  • Rear HO2S malfunction
  • Leakage exhaust gas
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