Diagnostic Aids

An open in idle input circuit will not cause DTC P0120 or P0121 to set. If DTCs P0110, P0115 and P0120 are also set, sensor ground circuit may be at fault.

An intermittent condition may be caused by poor connection, rubbed-through insulation, or a broken wire inside insulation. Check PCM harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, or poor terminal-to-wire connections before component replacement.