LEMON Manuals: Even more car manuals for everyone: 1960-2025

Home >> Mazda >> 2003 >> B2300 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0131 Or DTC P0151 >> Possible Causes

April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

Possible causes are:

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

scientia non olet · About LEMON Manuals