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DTC P0103: Notes

DTC P0103 (LF, L3) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0103 MAF sensor circuit high input
DETECTION CONDITION 
  • The PCM monitors the input voltage from the MAF sensor when the engine running. If the input voltage is above 4.9 V  , the PCM determines that the MAF circuit has malfunction.

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle.
  • PENDING CODE is available if the PCM detects the above malfunction condition.
  • FREEZE FRAME DATA is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • MAF sensor malfunction
  • Connector or terminal malfunction
  • Short to power supply in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1AK(1), 1AC(2)
  • Open circuit in wiring harness between MAF/IAT sensor terminal B and PCM terminal 1AR(1), 1AE(2)
  • PCM malfunction
G04954277Courtesy of MAZDA MOTORS CORP.
(1) LF MTX, L3 and California emission regulation applicable model with LF ATX
(2) Except for California emission regulation applicable model with LF ATX
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