Dtc P0101 [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DTC P0101
• The PCM compares actual MAF amount with expected MAF amount when the
engine is running.
Diagnostic support note
DETECTION
CONDITION
• This is a continuous monitor (CCM).
• 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.
• 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.
• MAF sensor malfunction
• TP sensor malfunction
• Electrical corrosion in MAF signal circuit
POSSIBLE
• Electrical corrosion in MAF RETURN circuit
CAUSE
• Voltage drop in MAF signal circuit
• Voltage drop in ground circuit
Diagnostic procedure
STEP INSPECTION
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
• Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
2
• Verify related service repair information
availability.
Downloaded from

DTC P0101 [LF]

MAF sensor circuit range/performance problem
- If the mass intake air flow amount is below 5.0 g/s {0.66 lb/min} for 5 s and
throttle opening angle is above 50% with engine running, the PCM
determines that detected mass intake air flow amount is too low.
- If the mass intake air flow amount is above 96.0 g/s {12.7 lb/min} for 5
s and the engine speed is below 2,000 rpm with the engine running, the
PCM determines that detected mass intake air flow amount is too high.
Yes Go to the next step.
No
Yes
No Go to the next step.
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ACTION
Record the FREEZE FRAME DATA on repair
order, then go to the next step.
Perform repair or diagnosis according to the
available repair information.
• If vehicle is not repaired, go to the next step.
- automotive repair manuals website
B3E010201084W05