What does fault code C0022 mean?

1 Answers
MacPeter
07/29/25 2:21pm
C0022 fault code, applicable to all automobile manufacturers, means Brake-Booster-Solenoid (Subfault). The brake booster utilizes vacuum generated by the engine intake system (or a dedicated vacuum pump) to assist braking. More details are as follows: 1. After troubleshooting the vehicle, it is necessary to clear the fault code. When clearing the fault code, it is essential to follow the specified fault code clearing method for the particular vehicle model. Under no circumstances should the method of disconnecting the battery's negative terminal be used to clear the fault code. 2. Otherwise, the following two abnormal situations may occur: (1) First, it may cause the control computer of some vehicle models to lose 'experience memory'. Many vehicle models' computers have an automatic memory function. If the connection line of the battery's negative terminal is removed, the useful engine operation data stored in the random access memory will be erased, resulting in poor performance of the vehicle for a considerable period after repair, or the reappearance of the previous fault code shortly after driving; (2) Second, it may cause the loss of normal functions.
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