P0509moderate severityPowertrain
Idle Air Control System Circuit High
on 2014 Audi A6 3.0L Supercharged V6 · AWD
What this code means
High voltage in IAC circuit.
Symptoms
- High idle
- Racing idle
Common causes
- Short to power
- Faulty IAC motor
- Open ground
Diagnostic steps
- Test IAC voltage
- Check for shorts to power
Repair notes
Replace IAC or repair wiring.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1