BMW P1643: Throttle Valve Actuator Start Test Amplifier Balancing Plausibility
Is your scanner showing BMW P1643?
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BMW P1643: Throttle Valve Actuator Start Test Amplifier Balancing Plausibility
OVERVIEWWhat Does The BMW P1643 Code Mean?
During the throttle valve adaptation routine the diagnostic function monitors the offset and amplification of throttle valve potentiometer 1 in the amplified range.
This fault is recognized when the amplifier’s offset exceeds 0.1 V or drops below -0.1 V. This fault is also registered when the amplification factor is greater than 4.15 or less than 3.85.
What Are The Potential Causes Of The BMW P1643 Code?
Below are some potential causes of this DTC:
- TP sensor signal circuit is open (inspect wiring & connector)
- TP sensor signal circuit is shorted to ground
- TP sensor or module is damaged or it has failed
- Throttle valve is damaged or dirty
- Throttle valve control module is faulty
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> labwork Throttle Position Sensor 13631402143 Fit for BMW M3 M5 Z3 Z4 E34 E36 E39 E46 E52 E85
>>> 13547502444 Throttle Body Compatible with BMW 325i 325Ci 325xi 525i X3 Z3 Z4
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
ENGINE PERFORMANCE Self Diagnosis for P1643 – 2011 BMW 535xi, pages 148-149.
