What's the matter with Buick Regal's fault lights all on?

The reasons why Buick Regal's fault lights are all on are: 1, ecu's can bus fault, and ecu's can interface contact is poor; 2. There are many dirt and carbon deposits, and the air circulation is abnormal, so it is impossible to accurately control the normal air intake, resulting in unstable gas content; 3. The fuel pressure is low and the constant pressure performance is poor, which leads to the low atomization level of the system and the difficulty in starting the car.

The causes of Buick Regal's fault lights are as follows: sensor problems: water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor damage; Maintenance problems: irregular maintenance and bad driving habits increase the engine running burden; Oil quality problem: the fuel filled in the car is labeled, and if it is not added as required, it will cause engine wear; False fault: a collision occurred during driving, a plug on the engine was tampered with, and the ECU signal was interrupted for a short time.

The causes of these failures can be divided into two categories:

1. Engine electrical fault: This kind of fault includes the damage of some sensors, such as air flow meter, throttle idling motor, intake pressure sensor, oxygen sensor, ignition coil, spark plug, water temperature sensor, crankshaft position sensor or camshaft position sensor, etc. In addition, it also includes some control pieces or actuators, such as engine computer, ignition computer, fuel pump, camshaft adjustment solenoid valve and so on. In addition to these electrical components, wires between these components may also cause failures.

Second, the cause of engine mechanical failure: for example, the change of fuel quality, the use of some fuel with more additives, or the air inlet, throttle or spark plug covered with carbon deposits, the air leakage of the air inlet below the standard value will also produce corresponding fault codes, and even the wrong engine fault light will be reported on the instrument in serious cases.

In any case, when the engine fault light is on, first look at whether it is a red or yellow warning light. If it is a yellow warning light, please send it to the repair shop for repair as soon as possible. If it is a red fault light, it is not recommended to start the vehicle, so you can only seek rescue.

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