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Home >> Scion >> 2007 >> tC Base, Automatic >> Repair and Diagnosis >> General Information >> Computer Relearn >> Engine Control System (2AZ-FE) >> SFI System >> DTC P0171 System Too Lean (Bank 1); DTC P0172 System Too Rich (Bank 1) >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

TYPICAL MALFUNCTION THRESHOLDS

Purge-cut Executing
Either of the following conditions is met: -
Average between short-term fuel trim and long-term fuel trim 35% or more (varies with ECT)
Average between short-term fuel trim and long-term fuel trim -35% or less (varies with ECT)
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