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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 589 (ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM L3 WITH TC])DTC P0203NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P0203: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0203 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0203 Injector circuit/open cylinder No. 3
DETECTION CONDITION 
  • If the fuel injection verification signal is not input at 255 times  continuously even though the PCM drives fuel injector No. 3, the PCM determines that there is an open circuit in the fuel injector No. 3 control circuit.

    MONITORING CONDITION 

    • The following conditions are met:
      • Engine speed: 4, 000 RPM or less 
      • Battery voltage: 10.03 V or more 
      • Fuel injection control: except during fuel cut

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTCs are stored in the PCM memory.
POSSIBLE CAUSE 
  • Fuel injector No. 3 malfunction
  • Injector driver module malfunction
  • Connector or terminal malfunction
  • Open circuit between fuel injector No. 3 terminal B and injector driver module terminal 1A
  • Open circuit between fuel injector No. 3 terminal A and injector driver module terminal 1C
  • Short to power supply between fuel injector No. 3 terminal A and injector driver module terminal 1C
  • Short to ground between fuel injector No. 3 terminal B and injector driver module terminal 1A
  • Short to ground between fuel injector No. 3 terminal A and injector driver module terminal 1C
  • PCM malfunction
G04324113Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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