# P1133 on the 2001 Toyota Highlander

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P1133

- [620043](https://open.wenmarpro.com/bulletins/620043), 2001-07-10: SUBJECT REGARDING ELECTRONIC CONTROL UNIT \(ECU\) REPROGRAMMING SUPPORT. CERTAIN 2001 FOUR CYLINDER VEHICLES, IF DRIVEN AT TEMPERATURES BELOW 30 DEGREES F, MAY DISPLAY A MALFUNCTION INDICATOR LAMP \(MIL\) AND STORE ONE OR MORE OF THE FOLLOWING DIAGNOSTIC TROUBLE CODES: P0171, P0174, P1130, P1133, P1150, OR P1155. IF THESE CODES ARE SET, AIR / FUEL RATIO SENSORS, BANK ONE, SENSOR ONE AND BANK TWO, SENSOR ONE ARE LIKELY DAMAGED AND BOTH SENSORS WILL NEED TO BE REPLACED. TO AVOID DAMAGING THE REPLACEMENT AIR / FUEL RATIO SENSORS DURING COLD WEATHER DRIVING THESE VEHICLES WILL NEED THEIR ECU REPROGRAMMED. \*TT