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Home >> Chevrolet >> 2001 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC P1431 >> Conditions for Setting the DTC

Conditions for Setting the DTC

The PCM does not detect a change in the secondary fuel level of at least 3.0 L (0.79 gal) over a distance of 320 km (200 mi).