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DTC P0118: Notes

DTC P0118 (LF, L3) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0118 ECT sensor circuit high input
DETECTION CONDITION 
  • The PCM monitors the ECT sensor signal. If the PCM detects the ECT sensor voltage is above 4.58 V  , the PCM determines that the ECT sensor circuit has malfunction.

Diagnostic support note 
  • This is a continuous monitor (Engine cooling system).
  • 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 
  • ECT sensor malfunction
  • Connect or terminal malfunction
  • Open circuit in wiring harness between ECT sensor terminal A and PCM terminal 2AH(1)(3), 2AK(2)
  • Short to power supply in wiring harness between ECT sensor terminal A and PCM terminal 2AH(1)(3), 2AK(2)
  • Open circuit in wiring harness between ECT sensor terminal B and PCM terminal 2AY(1), 2AA(2), 2P(3)
  • PCM malfunction
G04954283Courtesy of MAZDA MOTORS CORP.
(1) California emission regulation applicable model
(2) Except for California emission regulation applicable model with LF ATX
(3) Except for California emission regulation applicable model with LF MTX, L3
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