Dtc P0133 - Mazda 2002 6 Workshop Manual

STEP
19 VERIFY TROUBLESHOOTING OF DTC P0131 or
P0132 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition key to ON (Engine OFF).
• Clear DTC from memory using WDS or
equivalent.
• Start engine.
• Access ECT and RPM PIDs using WDS or
equivalent.
• Make sure that ECT PID is above 80 °C {176
°F}.
• Increase and keep engine speed above 1,500
rpm for at least 1 min.
• Is pending code the same as DTC present?
20 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See F–66 AFTER REPAIR
• Is there any DTC present?
End Of Sie

DTC P0133

DTC P0133 Front HO2S circuit malfunction
• PCM monitors inversion cycle period, lean-to-rich response time and rich-to-lean response time of the
sensor. 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, PCM determines that circuit has malfunction.
MONITORING CONDITIONS
— Drive mode 3
— Following conditions are met:
• Calculation load 14.8—59.4 % (at 2,000 rpm).
• Engine speed 1,410—4,000 rpm (MTX)
• Engine speed 1,190—4,000 rpm (ATX)
DETECTION
• Vehicle speed is above 3.76 km/h
CONDITION
• Engine coolant temperature is above -10 °C {14 °F}
• Front HO2S signal inversion cycle is above 10 cycles
Diagnostic support note
• This is an intermittent monitor. (OXYGEN SENSOR)
• MIL illuminates if 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 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 heater malfunction
• Pressure regulator malfunction
• Fuel pump malfunction
• Fuel filter 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
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
2 VERIFY RELATED SERVICE INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related Service Information available?
F–108
ON-BOARD DIAGNOSTIC
INSPECTION
PROCEDURE.)
INSPECTION
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE.)
No Troubleshooting completed.
Yes Go to next step.
No Record FREEZE FRAME DATA on repair order, then go to
next step.
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
ACTION
A6E397001084W23
ACTION