Mazda 3 Workshop Manual page 311

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DTC P0133
• The PCM monitors inversion cycle period, lean-to-rich response time and rich-to-lean
response time of the sensor. The PCM calculates the average of the inversion cycle
period-specified inversion cycles, average response time from lean-to-rich, and from
rich-to-lean when following conditions are met. If any exceeds threshold, the PCM
determines that circuit has malfunction.
MONITORING CONDITIONS
DETECTION
CONDITION
Diagnostic support note
• This is an intermittent monitor. (OXYGEN SENSOR)
• The MIL illuminates if the PCM detects the above malfunction condition in two
consecutive drive cycles or in one drive cycle while the DTC for the same malfunction
has been stored in the PCM.
• DIAGNOSTIC MONITORING TEST RESULTS is available.
• PENDING CODE is available if the PCM detects the above malfunction condition
during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
• Front HO2S deterioration
• Front HO2S malfunction
• Looseness front HO2S
• Pressure regulator (built-in fuel pump unit) malfunction
• Fuel pump malfunction
• Fuel filter (built-in fuel pump unit) clogged or restricted
POSSIBLE
• Fuel leakage on fuel line from fuel distribution pipe and fuel pump
CAUSE
• Leakage exhaust system
• Purge solenoid valve malfunction
• Purge solenoid hoses improper connection
• Insufficient compression
• Engine malfunction (Leakage engine coolant)
Downloaded from
Front HO2S circuit problem
- HO2S heater, HO2S, and TWC Repair Verification Drive Mode
- Following conditions are met:
• Calculation load is 14.8-59.4 % (at 2,000 rpm).
• Engine speed is 1,410- 4,000 rpm.
• Vehicle speed is above 3.76 km/h {2.33 mph}.
• Engine coolant temperature is above -10 °C {14 °F}.
• Front HO2S signal inversion cycle is above 10 cycles.
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B3E010201084W20