Some 2007 model year Tundra vehicle customers may complain of the Tire Pressure Warning System light intermittently flashing or turning “ON” with the following DTCs stored in the TPMS ECU: C2121 — Transmitter ID1 C2122 — Transmitter ID2 C2123 — Transmitter ID3 C2124 — Transmitter ID4 The TPMS ECU Assemblies have been modified to correct this condition. The old part number (89769--0C010) is replaced with the updated part number (89769--0C011). The TPMS ECU is located behind the glove box, next to the blower motor. See TSB SU005-07
