Touran p063800 Throttle control unit untrusted signal

The untrusted signal of Tuan p063800 throttle control unit is generated because there is black deposit on the inner wall of throttle throat, which leads to insufficient air intake in engine combustion chamber or accidental seizure of butterfly valve at idle speed. Clean the throttle valve. When cleaning, remove the throttle valve from the engine intake pipe and clean the side near the engine. Use a cleaning agent that is non-corrosive to metals to ensure that there is no black deposit left on the inner wall surface of the throttle throat after cleaning. After cleaning, put the throttle back to the engine, clear the fault code, and continuously track the 5000km non-repeated fault report to eliminate the fault.

Maintenance and cleaning method of Tuang throttle valve

Use the air inlet of the engine for disassembly-free maintenance and cleaning (get off the bus, then spray the throttle with cleaning agent or self-contained pressure cylinder, and constantly add and subtract the throttle to keep the engine running). Manual disassembly and cleaning can only clean the throttle valve, and disassembly-free cleaning can also clean the air inlet and valve port. The cleaning range of carbon deposit on the top of piston is wide. No matter which method is used, the throttle must be initialized and reset by computer after cleaning the throttle, otherwise the problem of idle jitter will occur.