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DTC P0112 [LF]: Notes

DTC P0112 (LF) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0112 IAT sensor circuit low input
DETECTION CONDITION 
  • The PCM monitors the IAT sensor signal. If the PCM detects that the IAT sensor voltage is below 0.16 V  , the PCM determines that the IAT sensor 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 first drive cycle.
  • FREEZE FRAME DATA (Mode 2/Mode 12) is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • MAF/IAT sensor connector or terminals malfunction
  • IAT sensor malfunction
  • Short to ground in wiring harness between MAF/IAT sensor terminal D and PCM terminal 1 AT
  • PCM connector or terminals malfunction
  • IAT sensor signal circuit and ground circuit are shorted to each other
  • PCM malfunction
G06149963Courtesy of MAZDA MOTORS CORP.
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