Chevrolet Trailblazer U121D Engine Trouble Code

Theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $200-$300 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

Chevrolet Trailblazer U121D Code Meaning :

When you check Chevrolet Trailblazer car engine light came on code U121D the reason should be . However manufacturer may have a different definition for the U121D OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U121D OBD-II Diagnostic Network (U) Trouble Code Description

U121D engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For U121D Code

The reason of U121D OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U121D 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.

U121C Previous Engine Trouble Code For Chevrolet Trailblazer

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