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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0171 Or DTC P0174 >> Detection Condition

Detection Condition

WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors Short Term Fuel Trim (SHTFT) and Long Term Fuel Trim (LONGFT) values when monitoring conditions are met or during Drive Mode 1. If fuel trim exceeds preprogrammed criteria, PCM determines fuel system is too lean and DTC is set. This is a continuous monitor. MIL illuminates if PCM detects malfunction in 2 consecutive drive cycles.

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