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According to the owner to the media, his black Audi A6L in the flat road driving, chassis suddenly issued a loud noise. Two days later, the vehicle suffered the same failure again. The owner said: "less than half a month to lift the car, driving only 500 kilometers, inexplicable, chassis 'bang' a loud noise, like hitting a big stone." At this time, the fault code appears on the display screen of the driving computer.

Then the owner drove the vehicle to 4S shop for maintenance. 4S indicates that the vehicle monitoring is finished. The fault analysis is that the fuel pump oil pressure is too high, or the sensor fails. The feedback is that if it is repaired, either the fuel pump or the sensor should be replaced. Later, its after-sales director said: take other cars to do a comparison, is the fuel pump problem, change the pump bar.

After listening to the owner put forward their own demands, whether to return or change cars. The pre-sales consultant said: "If it conforms to the three-package policy of the car, it should be changed, returned, repaired, to be honest, I also want to change this 3.0T model some time ago","But this car has too many minor defects, not you one such, I have handled a few, recently only a Hebei owner is also encountered this problem." As he spoke, he turned over the WeChat chat history to the owner. When the owner asked why, the after-sales consultant said: "The reason why the failure rate of these 3.0T cars is very high is that the technology has been upgraded and there are too many high-tech things."

Some professional technical personnel said that because the gasoline pump works in a closed and oil-soaked environment for a long time, the general vehicle needs to be used for about 5-8 years before the oil supply pressure is insufficient, and it needs to be replaced in time to ensure the normal operation of the engine. However, the technician also believes that it is rare in the industry for a new car to have too much pressure. Because the gasoline pump is driven by electronic pump, the probability of too high or too low fuel pressure under original calibration is very low, and it is speculated that the high probability is caused by the quality problem of batch parts.

It is understood that Audi at this stage of the new car because the engine fuel supply mode is in-cylinder direct injection design, gasoline pump output a certain fuel pressure will be located in the upper part of the cylinder head through the high-pressure oil pump for fuel pipeline pressurization again, so that when the injector re-injection, the cylinder gets better air-fuel ratio, improve efficiency and save fuel. When the engine ECU detects that the output fuel pressure of the gasoline pump is too high, the ECU will reduce and stop the output of the gasoline pump for a short time until the fuel pressure is restored. At present, the official has not responded to this matter, and we will continue to pay attention to the follow-up situation.

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