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DTC P2123:00: Notes

DTC P2123:00 (L3 WITH TC) DETECTION CONDITION & POSSIBLE CAUSES

DTC P2123:00 APP sensor No. 1 circuit high input
DETECTION CONDITION 
  • The PCM monitors the APP sensor No. 1 signal. If the PCM detects that the APP sensor No. 1 voltage is above 4.8 V  , the PCM determines that the APP sensor No. 1 circuit has a malfunction.

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • APP sensor connector or terminals malfunction
  • PCM connector or terminals malfunction
  • Short to power supply in wiring harness between APP sensor terminal B and PCM terminal 1Y
  • APP sensor No. 1 power supply circuit and signal circuit are shorted to each other.
  • Open circuit in wiring harness between APP sensor terminal C and PCM terminal 1U
  • APP sensor No. 1 malfunction
  • PCM malfunction
G06731681Courtesy of MAZDA MOTORS CORP.
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