DTC P0174: 2/1 Fuel System Lean: Notes

NOTE: For circuit identification and wiring diagram, see WIRING DIAGRAMS article. If Powertrain Control Module (PCM) is replaced, PCM must be reprogrammed. See PROGRAMMING . After each repair procedure has been completed, reconnect all components. Perform POWERTRAIN VERIFICATION TEST VER-5 under VERIFICATION TESTS to ensure system is functioning properly.

NOTE: DTC P0174 indicates 2/1 fuel system lean. 2/1 refers to upstream Heated Oxygen Sensor (HO2S). 2/1 HO2S is located in front of engine compartment, on left bank exhaust manifold.