What causes the system to be too lean in Volkswagen cylinder bank 1 at idle?

1 Answers
JulietFitz
07/30/25 9:54am
The reasons for the system being too lean in Volkswagen cylinder bank 1 at idle are: 1. Clogged fuel injector; 2. Excessive air intake; 3. Exhaust pipe leakage; 4. Aging and softening of the crankcase ventilation valve diaphragm in the oil-gas separator. The methods to address the system being too lean in cylinder bank 1 at idle are: 1. Check the fuel injector atomization; 2. Inspect the electronic control system; 3. Verify if the engine intake pressure sensor is faulty. Taking the 2020 Volkswagen Magotan as an example, its body dimensions are: length 4865mm, width 1832mm, height 1471mm, wheelbase 2871mm, fuel tank capacity 66 liters, and trunk capacity 533 liters.
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