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Home >> Mazda >> 2003 >> B4000 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0131 Or DTC P0151 >> Possible Causes

Possible Causes

Possible causes are:

Contaminated HO2S.
Crossed HO2S signal wiring or signal return wiring.

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