What is the fault code 0746 of 22 1 Mercedes-Benz s350?

22 1 Mercedes-benz s350 fault code: P0746 meaning: the mixed gas in bank 1 is too strong.

The rich mixture in the cylinder block should be caused by the unbalanced mixture. The reason is: the air intake system leaks. The signal of the intake pressure sensor is wrong. The throttle position sensor is faulty. The oil pressure is abnormal. The fuel injector is blocked. The oxygen sensor signal is not working properly.

Solution: Check the oxygen sensor circuit and replace the oxygen sensor if necessary; Check and replace the intake air flow sensor to detect the intake air temperature and pressure sensor; Cleaning the throttle can reduce fuel consumption, make the engine flexible and energetic, and reduce the air-fuel mixture in the cylinder.

The fault codes reflected by ECU analysis of automobile computer after automobile fault are generally caused by sensor fault, but some mechanical fault ECU can't read them. There will be some basic fault indications on the dashboard of the car.

Extended data:

Maintenance of automobile air intake system;

1. Remove the automobile air filter; Pay attention to its shape, the square one should pay attention to the installation direction, and the round one is unnecessary.

2. Clean the air filter; If you use a hair dryer to clean things, you should pay attention to the direction, from the inside out; If you use a vacuum cleaner, you can only use it from the outside.

3. Replace the cleaned air filter.

4. When cleaning the throttle valve, it is not necessary to disassemble it, but the sealing part of the inlet steam must be cleaned, and the idle motor must be disassembled for cleaning. Nozzle borrowing and cleaning-free disassembly have their own advantages and disadvantages. Generally speaking, the maintenance station suggests that disassembly is not required to prevent other unnecessary waste.

Baidu Encyclopedia-Automobile Air Intake System