Chevrolet K-20 U3121 Engine Trouble Code

When your car's 'Chevrolet K-20 U3121 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.

Chevrolet K-20 U3121 Code Meaning :

When you check Chevrolet K-20 car engine light came on code U3121 the reason should be . However manufacturer may have a different definition for the U3121 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U3121 OBD-II Diagnostic Network (U) Trouble Code Description

U3121 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For U3121 Code

The reason of U3121 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U3121 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.

U3120 Previous Engine Trouble Code For Chevrolet K-20

Next Engine Trouble Code For Chevrolet K-20 U3122