Mercedes Cl 500 U121B Engine Trouble Code

Mercedes Cl 500 U121B 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.

Mercedes Cl 500 U121B Code Meaning :

When you check Mercedes Cl 500 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.

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