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DTC P0418 Secondary Air Injection System Control "A" Circuit: Description

Refer to DTC P0412  (See .

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
P0418 Both of the following conditions are met, when idling just after cold start (1 trip detection logic)
  1. Air injection (AIR) system does not operate
  2. Air injection control driver (AID) outputs air pump malfunction signal (20% duty signal)
  • Open in air pump drive circuit
  • Short between air pump circuit and +B circuit
  • Air injection control driver (AID)
  • ECM
P0418 Both of the following conditions are met, when idling just after cold start (1 trip detection logic)
  1. Air injection (AIR) system operates
  2. Air injection control driver (AID) outputs air pump malfunction signal (20% duty signal)
  • Short between air pump circuit and body ground
  • AID
  • ECM
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