DTC P0121: Throttle Position Sensor Circuit Range/Performance: Notes

WARNING: This page is about a different car, the 2003 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTCs related to TPS, IAT sensor, MAF meter, ECT sensor, APP sensor & VPS are output simultaneously, the E2 sensor ground circuit at ECM 31-pin connector E7 terminal No. 11 (Black/White wire) may be open. For ECM electrical connector terminal identification, see Figure. It may be necessary to check Black/White wire between splice I13 and ECM 31-pin connector E7 terminal No. 11. Splice I13 is located behind passenger's side of instrument panel. See Figure.