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DTC P0118:00: Notes

DTC P0118:00 (L3 WITH TC) DETECTION CONDITION & POSSIBLE CAUSES

DTC P0118:00 ECT sensor No. 1 circuit high input
DETECTION CONDITION 
  • The PCM monitors the ECT sensor No. 1 signal. If the PCM detects the ECT sensor No. 1 voltage is above 4.59 V  for 5 s  , the PCM determines that the ECT sensor No. 1 circuit has a malfunction.

Diagnostic support note 
  • This is a continuous monitor (engine cooling system).
  • 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 
  • ECT sensor No. 1 connector or terminals malfunction
  • ECT sensor No. 1 malfunction
  • PCM connector or terminals malfunction
  • Short to power supply in wiring harness between ECT sensor No. 1 terminal A and PCM terminal 2AH
  • Open circuit in wiring harness between the following terminals:
    • ECT sensor No. 1 terminal A-PCM terminal 2AH
    • ECT sensor No. 1 terminal B-PCM terminal 2AY
  • PCM malfunction
G06731624Courtesy of MAZDA MOTORS CORP.
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