Buick Model 2x-4x U121B Engine Trouble Code

When your car's 'Buick Model 2x-4x U121B Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

Buick Model 2x-4x U121B Code Meaning :

When you check Buick Model 2x-4x car engine light came on code U121B the reason should be . However manufacturer may have a different definition for the U121B OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U121B OBD-II Diagnostic Network (U) Trouble Code Description

U121B engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For U121B Code

The reason of U121B OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U121B 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.

U121A Previous Engine Trouble Code For Buick Model 2x-4x

Next Engine Trouble Code For Buick Model 2x-4x U121C