1997 Mazda 626 ES
DTC P0171, P0172, P1130, P1131 OR P1132 - FUEL CONTROL, HO2S NOT SWITCHING
NOTE: For connector identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see L - WIRING DIAGRAMS - 2.0L article.
Diagnostic Aids
Perform this test when instructed during QUICK TEST or if directed by other test procedures. Only use this test to diagnose the following:
HO2S and sensor connection.
Vacuum systems.
Fuel injector and/or fuel injector circuitry.
Powertrain Control Module (PCM).
Electrical circuits (HO2S, HO2S GND, INJ 1-4, VPWR and SIG RTN).
NOTE: HO2S may be displayed on scan tool as 02S.
To prevent replacement of good components, be aware, the following non-EEC areas may be cause of driveability concerns: Download File PDF
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