Toyota Previa U0121 Engine Trouble Code

Toyota Previa U0121 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,000. Taking your car into a shop will cost you around $200 depending on the car. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual. If you know where the sensor is, you only have to unclip the old sensor and replace it with a new one. Regardless of how you approach it, you should get this fixed right away.

Toyota Previa U0121 Code Meaning :

When you check Toyota Previa car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However manufacturer may have a different definition for the U0121 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U0121 OBD-II Diagnostic Network (U) Trouble Code Description

U0121 OBD-II Trouble Code Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and comm U0121 code.

Reason For U0121 Code

The reason of U0121 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U0121 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

U0120 Previous Engine Trouble Code For Toyota Previa

Next Engine Trouble Code For Toyota Previa U0122