Throttle Actuation Potentiometer Signal 2 Range
2002-2005 Audi A4 3.0L V6
Description
The ECU detected that the second throttle position potentiometer signal is outside its expected voltage range. VW/Audi throttle bodies use dual potentiometers for redundancy and safety.
Symptoms
- Check Engine Light
- Reduced power mode
- Throttle response erratic
- Engine may idle only
Common Causes
- Faulty throttle body unit
- Damaged wiring to throttle position sensor 2
- Corroded connector
- Throttle body contamination affecting sensor
- ECU fault
Diagnostic Steps
- Read throttle position sensor 1 and 2 values with scan tool
- Check for proper signal tracking between both sensors
- Inspect throttle body connector
- Test wiring continuity for sensor 2
- Clean throttle body and retest
Repair Notes
Replace the throttle body assembly if the internal potentiometer has failed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1171 on Other Vehicles
Common Questions
What does code P1171 mean on a 2002-2005 Audi A4?
P1171 stands for "Throttle Actuation Potentiometer Signal 2 Range". The ECU detected that the second throttle position potentiometer signal is outside its expected voltage range. VW/Audi throttle bodies use dual potentiometers for redundancy and safety.
What are the symptoms of P1171 on a Audi A4?
Common symptoms of P1171 include: Check Engine Light, Reduced power mode, Throttle response erratic, Engine may idle only.
What causes P1171 on a 2002-2005 Audi A4?
Common causes of P1171 include: Faulty throttle body unit, Damaged wiring to throttle position sensor 2, Corroded connector, Throttle body contamination affecting sensor, ECU fault.