FixVault
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Mazda
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2002
›
Tribute ES, FWD
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Repair and Diagnosis
›
Engine Performance
›
System
›
Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P1128 Or DTC P1129
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Possible Causes
Possible Causes
Possible causes are:
Crossed HO2S harness connectors.
Crossed wiring at HO2S harness connectors.
Crossed wiring at PCM 104-pin harness connector.
Poor terminal connection.