How to solve Passat fault code p 1639?

According to the prompt of fault code p 1639, check whether the data percentages in data flow detection groups 060, 062 and 063 are normal and reasonable, and check whether the values change accordingly when the pedal is pressed. If the accessed data is abnormal, check the control circuit of the accelerator pedal position sensor, and repair it if it is abnormal.

Passat fault code p 1639 represents the fault of the accelerator pedal position sensor, which is controlled by the accelerator under your feet. It is mainly responsible for controlling the fuel-air mixture ratio of engine combustion. Simply put, the air passes through the air filter, enters the cylinder of the engine through the throttle, and starts to do power combustion. Because air filters can't completely filter out impurities in the air, they often cause pollution. Regular cleaning is only good, not bad. Just be sure to check whether the O-ring seal is damaged after cleaning, otherwise it will cause unstable idle speed.

If there is a feedback signal, check whether the feedback signal line is short-circuited; If no feedback signal is received, it may be a circuit fault in the module. It is recommended to replace the new module, or ask professionals or manufacturers to repair it.