GM P1174 + P1175 Codes: Causes + How to Fix
P1174 and P1175 are GM-specific DTCs (Diagnostic Trouble Codes). They indicate fuel bank trim issues on bank 1 and bank 2. Quick Info GM P1174 + P1175 Definition Fuel Trim Cylinder Balance (Bank 1 or Bank 2) Symptoms Mild misfire, MIL light Common Causes Bad O2 sensors, spark plugs, or fuel injectors Breakdown Risk? Almost … Read more