Diagnostic Aids

Visually/physically inspect both sensors for contamination. If contamination is evident, find cause of contamination (lead, silicone, heavy engine oil/coolant consumption, etc.). To verify repair or to determine if condition is intermittent, monitor OBD-II test status for Code P0174.

Fig 1: Code P0174 Schematic (Corvette) Bank 2 Fuel Trim System Too Lean

Fig 2: Code P0174 Flow Chart (Corvette) Bank 2 Fuel Trim System Too Lean