In addition to this, we can also check micro-psychological or public numbers: vehicle accident risk records, risk insurance, business risk insurance, vehicle status, mortgage status, kilometres, vehicle plates, frame numbers, number of vehicles, etc
Iii. Access to permits and maintenance manuals
The permit and maintenance manual, which is an important document and information for vehicles, usually records vehicle protection. By looking at these two documents, you can find information about the duration of maintenance of the vehicle, the maintenance mileage, etc. It should be noted, however, that this information may not be exhaustive enough to give you a full picture of the protection status of the vehicle。
The meaning of oil pressure alarms
The oil pressure alarm light is activated, meaning that the vehicle oil stock or pressure is below standard. When the oil pressure sensor monitors that the main channel's oil pressure is below the specified value, the light on the dashboard sets a red light signal. If the light continues to be activated, the engine may be badly worn because of inadequate lubrication and, in extreme cases, even cause serious engine failure。
Response to oil pressure alarms
Initial emergency response
Stop the vehicle immediately: the oil pressure alarm light is activated, the vehicle must be twinned, the vehicle placed in a flat and safe place, the engine shut down, the engine operated without sufficient oil pressure, and the interior parts of the engine must be protected from friction and temperature increase。
Waiting for cooling: after parking, open the hood and cool the engine for some time to allow for better follow-up checks。
Check the oil
Check the fluid level of the engine: after cooling the engine, pull out the oil ruler and check the fluid level of the engine. If the fluid level of the oil is below the minimum marking line, indicating that the oil is insufficient, the oil size and specifications appropriate to the vehicle engine may be added, slowly inverted to avoid spilling, and not added too much at one time to affect the normal operation of the engine。
Check the quality of oil: check if the oil colour is darker, denser or smelly, and if this occurs, indicate that the oil has deteriorated and needs to be replaced in a timely manner, while replacing the oil filter to ensure its cleanness。
In-depth troubleshooting
Examination of pipeline roads and filters: if the fluid is of a normal and good quality, it may be because of congestion of the pipeline or filter that the alarm is called. It is possible to check whether the pipeline road has been damaged, leaked or blocked, as well as whether the oil filter has been blocked and, if there are problems with timely repair or replacement。
Inspection of oil pumps: the pumps are the core parts of the engine lubrication system and, if they fail, they lead to alarms. It is possible to hear the sound of the engine to determine whether the pump is working, and if the engine is operating with abnormal noise, it may be that the pump is malfunctioning and the vehicle should be sent to a specialized maintenance shop as soon as possible。
Inspection of other components: check whether the engine temperature is too high, and if the engine cools with too much water, too much heat, too long overloading or too late for oil pumps, it overheats the engine, aging, deforming and thinning of the engine, leaking from the gap between the various co-operations, reducing the pressure, and removing the water dirt, adjusting the fuel supply time and keeping the engine within the rated load. At the same time, check whether the springs of the restricted valves are too soft, whether the valves have been worn out, whether the valves have been damaged or failed, and if the springs of the returning valves in the main oil routes are softened or poorly adjusted, the co-opting of the valves and steel balls are worn or jammed, the amount of refuelling will increase significantly and the pressure of the main oil routes will decrease。
Inspection of circuit systems: when oil pressure sensors (i. E. Oil induction plugs) fail, the control unit does not detect pressure information, which can also lead to oil pressure alerts, and can screen for failure of circuits。
Follow-up
Contact professional maintenance: if you cannot solve the problem yourself, contact the professional maintenance store immediately and send the vehicle to the repair。
