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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls - Self-Diagnostics - 2.0L) >> Diagnostic Tests >> DTC P0421: Catalyst Warm-Up Efficiency, Low >> Notes

DTC P0421: Catalyst Warm-Up Efficiency, Low: Notes

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Front HO2S is identified as O2S11. Rear HO2S is identified as O2S12.
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