Helpful Automotive Resources
P0170 Code: Fuel Trim (Bank 1)Diagnostic Trouble Code (DTC) P0170 stands for “Fuel Trim Malfunction (Bank 1).” Fuel trim is the adjustment made by the PCM to the engine’s air-fuel mixture. The P0170 code indicates that the fuel trims have reached an abnormally low or abnormally high value for a specified amount of time.
P2187 Code: System too Lean at Idle (Bank 1)Diagnostic trouble code (DTC) P2187 stands for “System Too Lean at Idle (Bank 1).” It indicates that your vehicle’s computer has detected a potential issue with the fuel mixture at idle.