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Discussion Starter · #1 · (Edited)
Hi guys,

Need your help with this. So, I have mazda3 2012 GX and it is showing multiple codes with OBD2 scanner but few are confirmed. At this stage, I am trying to figure out if the MAF needs to be replaced since P0101 is confirmed. I did the unplug test, and when unplugging the MAF engine keeps running which is fine, but when re-plug it, the engine immediately dies. Does this mean bad MAF? I have attached the complete reading of OBD2. I know about the TCM problem and that I might end up replacing it. Any help is appreciated. Thanks

Code:
Car Scanner ELM OBD2
DTC report
Selected brand: Mazda
VIN: JM1BL1UF8C

============1==============
P0101
Raw code: 0101
ECU: Engine control unit
Status: Confirmed
OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - range/performance problem

============2==============
U0101
Raw code: C101
ECU: Engine control unit
Status: Confirmed
OBDII: Data bus, transmission control module (TCM) - no communication

============3==============
P0101(00)
Raw code: 010100
ECU: Engine control unit
Status: Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested
OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - range/performance problem

============4==============
P2504(00)
Raw code: 250400
ECU: Engine control unit[Archive (inactive)]
Status: Confirmed, Test failed since last DTC clear
OBDII: Charging system - voltage high

============5==============
U0101(00)
Raw code: C10100
ECU: Engine control unit
Status: Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested
OBDII: Data bus, transmission control module (TCM) - no communication

============6==============
P0012(00)
Raw code: 001200
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Camshaft position (CMP), intake/left/front, bank 1 - timing over-retarded

============7==============
P0037(00)
Raw code: 003700
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S) 2, bank 1, heater control - circuit low

============8==============
P0038(00)
Raw code: 003800
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S) 2, bank 1, heater control - circuit high

============9==============
P0054(00)
Raw code: 005400
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S), bank 1, sensor 2 - heater resistance

============10==============
P0125(00)
Raw code: 012500
ECU: Engine control unit
Status: Test not completed during this operation cycle
OBDII: Insufficient coolant temperature for closed loop fuel control

============11==============
P0133(00)
Raw code: 013300
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S) 1, bank 1 - slow response

============12==============
P0137(00)
Raw code: 013700
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S) 2, bank 1 - low voltage

============13==============
P0139(00)
Raw code: 013900
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S) 2, bank 1 - slow response

============14==============
P0140(00)
Raw code: 014000
ECU: Engine control unit
Status: Test not completed during this operation cycle
OBDII: Heated oxygen sensor (HO2S) 2, bank 1 - no activity detected

============15==============
P0171(00)
Raw code: 017100
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: System too lean, bank 1

============16==============
P0172(00)
Raw code: 017200
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: System too rich, bank 1

============17==============
P0300(00)
Raw code: 030000
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed during this operation cycle
OBDII: Random/multiple cylinder(s) - misfire detected

============18==============
P0301(00)
Raw code: 030100
ECU: Engine control unit
Status: Test not completed since last DTC clear, Test not completed duri
 
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