Audi Multitronic - P171E & P171F Fault Code - Transmission Input Shaft Speed Sensor 2 No Signal / Implausible Signal
These fault codes indicate a missing or implausible signal from the second input shaft speed sensor. This can lead to shift problems and the car entering limp mode. The problem could be in the Multitronic / Hytronic VL381F 8-Speed TCU.
Which Audi models do these fault codes impact?
Error codes P171E and P171F are often seen in the following Audi models:
Diagnosis and solution P171E and P171F
If you're presented with the P171E and P171F fault codes, it's important to work through a thorough diagnostic process. Start by measuring the sensor values with a diagnostic scan tool, check the signals at varying speeds, and it should become clear if a sensor is transmitting logical data.
It's then essential to inspect all the wiring and connectors. Damage or loose connections can disrupt the electronic signals, resulting in frustrating faults. If required, clean and repair any damage to ensure optimal functionality. If the sensor is deemed faulty, then replacement is the only option.
Solution: Remanufacture at ACTRONICS
If you're continually being presented with the P171E and P171F fault codes, then Multitronic / Hytronic VL381F 8-Speed TCU needs to be remanufactured. ACTRONICS offers a thorough repair for this part, in which wear-sensitive components are replaced to ensure maximum reliability.
Remanufacturing or repair is a much cheaper, sustainable alternative to purchasing a new unit. The completed module is supplied back to you with a two-year warranty and is plug & play with no additional programming required.
If you have any questions, please contact our product specialists.