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Home >> Mazda >> 2003 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0171: Fuel Trim - Too Lean >> Detection Condition

Detection Condition

WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when Short Term Fuel Trim (SHRTFT) or Long Term Fuel Trim (LONGFT) values exceed preprogrammed criteria while Drive Mode 1 (PCM Adaptive Memory) is running. See DRIVE MODES  under SELF-DIAGNOSTIC SYSTEM. This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition in 2 consecutive drive cycles. Pending code is available if PCM detects malfunction condition during first drive cycle. Freeze Frame Data is available and DTC is stored in PCM memory.

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