P1564moderate severityPowertrain
Idle Speed Control Throttle Position Lower Limit Not Reached
on 1996 Audi A6 2.8L V6 · AWD
What this code means
The ECU detected that the throttle plate cannot reach its lower limit (closed position) during idle speed control. The minimum throttle opening is higher than expected.
Symptoms
- Idle speed too high
- Check Engine Light
- Cannot achieve low idle
- Increased fuel consumption at idle
Common causes
- Carbon buildup preventing throttle closure
- Throttle body motor binding
- Throttle cable binding (older models)
- Cruise control cable interference
- Damaged throttle body bore
Diagnostic steps
- Clean throttle body thoroughly
- Check throttle cable (if equipped) for binding
- Perform throttle body adaptation
- Inspect throttle body bore for damage
- Test throttle motor operation
Repair notes
Clean the throttle body to remove carbon and perform throttle body adaptation.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1