Cx4。 Install the Xiao encoder on the rear oxygen sensor and clear the fault code.

Clean the throttle, clean the rear oxygen sensor, then turn off the power and reconnect it after a few minutes. This should clear the trouble. Just try it. This is the last time I troubleshoot the rear oxygen sensor. If not, I can only replace the rear oxygen sensor, more than 300 pieces.

When your car breaks down, you need to clear the fault code. When clearing CX-4 fault code, it needs to be cleared according to the fault code clearing method specified by the corresponding Mazda model, and it is absolutely impossible to simply remove the negative battery ground wire to clear the fault code. Otherwise, it is likely to cause the following two problems: First, the control computers of some models will lose their "experience memory". As we all know, some models of control computers have automatic memory function. If the connecting wire of the negative electrode of the battery is removed, the engine operating experience data stored in the random access memory (RAM) will be automatically cleared, so that the cleared fault code can be reproduced after the car has poor performance for a long time after maintenance or after driving for a period of time; Secondly, some useful functions of CX-4 sometimes fail, such as audio locking is one of the more common examples. In this case, the audio must be serviced separately.