DTC Audi P1171 Short Explanation
Channel: Maxidot
Date: 23/12/2020

The video focuses on the basic Audi specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make: 
Audi 
Code: 
P1171 
Definition: 
Throttle Actuation Potentiometer Sign.2 Range or Performance 
Description: 
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, coolant temperature must be at least 80 degrees Celsius and the accelerator pedal must be properly adjusted. The ECM detected an incorrect singal from the throttle potentiometer. Note: If the complete throttle valve control module is current-less (e. g. connector disconnected) the throttle valve moves into a particular, specified mechanical position, which signals an increased idle speed with an engine at operating temperature. If only the Throttle Position (TP) actuator is current-less, the throttle valve also moves into the specified mechanical position (emergency running gap), however, since Closed Throttle Position (CTP) switch can still be recognized, an “almost normal idle RPM” is reached via the respective ignition angle retardation. Note: Terminal assignment at throttle control module is different in vehicles with and without cruise control. Characteristic: Steering column switch with operating module for cruise control. 
Cause: 
Throttle valve control module has failed
Throttle valve is dirty or damaged
Throttle valve is not in a closed position
Voltage supply of throttle valve control module is shorted or open
ECM has failed