The P0003 fault code applies to all car manufacturers and means the fuel quantity regulator control circuit is low.
Background Information: (In newer cars where fuel injectors are widely used, fuel quantity regulators are rarely used anymore.)
After troubleshooting a car malfunction, the fault codes need to be cleared. When clearing codes, it is crucial to strictly follow the fault code clearing procedure specified for the particular vehicle model. It is important not to arbitrarily disconnect the battery’s negative ground wire to clear fault codes. Otherwise, the following two abnormal situations may occur: First, it may cause the control center computer of some models to lose its normal records. As we all know, many car computers have an automatic memory function. If the battery’s negative connection is disconnected, the engine operating experience data in the random access memory will be lost. This explains why some people find that after clearing the fault codes, the performance is poor for a long time, or the cleared fault codes reappear after driving for a period of time. Second, it may cause the loss of certain functions, such as the frequent loss of the audio lock function. In this case, a more complicated procedure is required to decrypt the audio system to restore its normal operation.
Tip: To quickly find fault codes, you can use a professional OBD2 scanner to obtain the corresponding fault codes, which can help pinpoint the exact problem. This data can help you understand the performance of vehicle components and troubleshoot potential problems before they become serious.