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

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Refer to DTC P0412  .

DTC TROUBLE DETECTION CONDITION

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 (Al) 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 pump
  • 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 (Al) system operates
  2. Air injection control driver (AID) outputs air pump malfunction signal (20% duty signal)
  • Short between air pump circuit and body ground
  • Air pump
  • AID
  • ECM