Automobile fault code Geely automobile p 12 12 16.

The standard automobile technical manual shows that the fault code P 12 12 is that the computer control signal voltage of IAC valve is too high. IAC stands for idle air control valve. This fault code may cause difficulty in landing, no idle speed or excessive idle speed.

The solution to this fault is as follows:

The idle air control valve is installed on the throttle body. Check whether the installation location and connecting cable are wrong.

(1) Connect the connector firmly to the idle air control valve, the intake manifold absolute pressure sensor and the throttle position sensor.

(2) When the ignition switch is turned on, check whether the rotary valve of IAC valve is opened and closed once in about 60ms, and then stop rotating. Note: the rotation of the valve body is instantaneous and may not be visible. Therefore, this inspection method should be used three or more times in a row.

(3) If it is confirmed that the rotary valve of the idle air control valve does not act, check whether the harness is open or short. If the harness is in good condition, replace the idle air control valve and recheck it.