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A few days ago, a 2016 BMW 316Li was sent here by our friends for maintenance. This car is equipped with an N13 engine, and has two fault codes: cylinder No.3 misfire detected and cylinder No.3 injection device off. The ignition coil, spark plugs, and injectors have all been replaced, and the engine has also been disassembled. It is said that a valve is bent and should be replaced, but the problem remains still as the cylinder No.3 misfire. They had already tested the cylinder pressure, and there’s no significant difference between the 4 cylinders, all around 1100kPa. During the...

Car: Audi Model: Q5 System: Engine Fault phenomenon: The cruise control function can be activated when idling, and the speed of the cruise control can also be increased or decreased (as shown in Figure 1), but the cruise control function cannot be activated when the vehicle is driving.   Figure 1 Diagnosis: The test drive finds that the cruise control function and the engine start-stop function is not available. Check the relevant system with a diagnostic tool, we didn't find any trouble codes. Looking at the reason preventing the engine from stopping is the "diagnostic interface", the diagnostics have no...

Car: Land Rover Model: Range Rover System: Air Conditioning Year model: 2022  Fault phenomenon: The customer complained about operating the lower display screen of the integrated control panel after starting the vehicle, and found that after the vehicle air conditioner was turned on, it automatically turned off. After the test vehicle seat heating and cooling functions were turned on, it still automatically turned off. The driver found this fault, which has nothing to do with the ambient temperature and is permanent. Check that the vehicle has no additional or modified items, and the maintenance history query has no relevant maintenance...

Car: Buick Model: GL8 System: Electrical Year: 2021  Fault phenomenon: The right-hand power sliding door cannot be closed electrically via the headliner or the right-hand B-pillar closing switch.  Troubleshooting: After receiving the customer's repair request, the following inspections were carried out according to the SBD process:  Understand and confirm the fault description. Ask the customer about the time, place, phenomenon, and frequency of the failure. The customer just bought a new car, and when he was about to install it in the modification shop, he found that he pressed the closing button of the electric sliding door on the right...

Fault phenomenon: The owner of this car reported that the central control door lock did not work properly. The specific phenomenon is that when the door is locked with the remote control, the 4 doors can be locked normally. When the door is opened with the remote control, the 4 doors cannot be unlocked. Only the left front door can be opened with the mechanical key to enter the car, and the vehicle starts normally.   Troubleshooting: After picking up the car, we first confirm the fault. It is indeed as described by the car owner that the door can...