How to shield the fault code of Mercedes-Benz 272 secondary air pump

This situation shows that the mixture of the engine is too rich, which is caused by too much mud and carbon accumulation in the throttle of the engine for a long time. To clear this fault code, the throttle of the vehicle must be cleaned. After cleaning the throttle, not only can the fault code be cleared.

1. Remove the air filter of Mercedes-Benz 272 engine.

2. After the air filter of Mercedes-Benz 272 engine was removed, the throttle of Mercedes-Benz 272 engine was exposed, and the throttle was closed.

3. Insert the wrench into the throttle of Mercedes-Benz 272 engine and push the throttle open.

4. Spray the accelerator cleaner into the accelerator of Mercedes-Benz 272 engine and brush it back and forth with a toothbrush.

5. After cleaning, wipe the inside with a paper towel.

6. Replace the air inlet of the air filter of Mercedes-Benz 272 engine to its original position, and the operation is completed.