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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (On-Board Diagnostic [Engine Controls MZI 3.7] (5 Of 5)) >> DTC P2271:00, P2273:00 >> Notes

DTC P2271:00, P2273:00: Notes

WARNING: This page is about a different variant/trim than selected.
DTC P2271:00 P2271:00: HO2S (RH) signal stuck rich
DTC P2273:00 P2273:00: HO2S (LH) signal stuck rich
DETECTION CONDITION 
  • P2271:00 indicates that HO2S (RH) signal is stuck rich
  • P2273:00 indicates that HO2S (LH) signal is stuck rich
  • The downstream HO2S is forced lean and monitored by the PCM. The test fails if the PCM does not detect the output of the HO2S in a calibrated amount of time.
POSSIBLE CAUSE  Electrical System: 
  • P2271:00: Short to ground between HO2S (RH) terminal B and PCM terminal 3Z
  • P2273:00: Short to ground between HO2S (LH) terminal B and PCM terminal 3AB
  • HO2S signal circuit short to other HO2S harness
  • P2271:00: Short to power supply between HO2S (RH) terminal B and PCM terminal 3Z
  • P2273:00: Short to power supply between HO2S (LH) terminal B and PCM terminal 3AB
  • HO2S malfunction
  • PCM malfunction

Intake Air System: 


  • Air leaks
  • Vacuum leaks
  • PCV system malfunction
  • Incorrectly seated engine oil dipstick, tube or oil filler cap

Base Engine: 


  • Exhaust leaks (flange, gaskets)
G08140200Courtesy of MAZDA MOTORS CORP.
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