DTC P0133:00, P0153:00 [MZI-3.7]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC P0133:00 DTC P0153:00	P0133:00: A/F sensor (RH) circuit slow response P0153:00: A/F sensor (LH) circuit slow response
DETECTION CONDITION	P0133:00 indicates slow response of A/F sensor (RH) circuit P0153:00 indicates slow response of A/F sensor (LH) circuit The PCM commands an air/fuel ratio that changes the waveform to a square shape. The PCM calculates the length of the resulting signal from the HO2S. The test fails when the length of the signal is less than a calibrated limit
POSSIBLE CAUSE	Contaminated A/F sensor Incorrect fueling MAF sensor malfunction Exhaust leaks Open or short circuit between PCM and A/F sensor Inlet air leaks Deteriorating A/F sensor A/F sensor heater malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.