Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 82 (5.2L - GENERIC SCAN TOOL, ENGINE CODE(S): BXA (ST-GENERIC SCAN TOOL))ST - GENERIC SCAN TOOLDIAGNOSTIC TROUBLE CODE (DTC) TABLESSAE P0XXX-DTCSSPEED AND IDLE CONTROL

2009 Audi A6 Base

Speed and idle control

2009 Audi A6 BaseSECTION Speed and idle control

WARNING: This page is about a different car, the 2009 Audi S6, 2008 Audi S6, and 2007 Audi S6. However, it is still accessible from the selected car via links, so may be relevant.

DTC

Error Message

Diagnostic Procedure

Malfunction Criteria and Threshold Value

Secondary Parameters with Enable Conditions

Monitoring Time Length

Frequency of checks, MIL Illum

P0501

Vehicle Speed Sensor A Range/Performance

Check vehicle speed signal. Refer to → Vehicle Speed Signal (VSS), checking .

VSS signal, 2.5 MPH

Fuel cut off, Active
Engine speed, 1120-4520 RPM

ECT, >39.75° C

2.5 Seconds

Multiple
2 DCY

P0506

Idle Air Control System RPM Lower Than Expected

Check the Throttle Valve Control Modules. Refer to → Throttle Valve Control Module, checking .

Engine speed deviation, -80 RPM
AND Idle controller at upper limit 4.98%

Engine speed, idle
Accelerator PP, 0%

Vehicle speed, 0 MPH
EVAP purge valve, Closed

Altitude, 2600 m
IAT, >-7° C

ECT, >60° C
Engine load, 40%

10 Seconds

Multiple
2 DCY

P0507

Idle Air Control System RPM Higher Than Expected

Check the Throttle Valve Control Modules. Refer to → Throttle Valve Control Module, checking .

Engine speed deviation,>80 RPM
AND Idle controller at lower limit -4%

Engine speed, idle
Accelerator PP, 0%

Fuel cut off, Not active
Vehicle speed, 0 MPH

EVAP purge valve, Closed
Altitude, 2600 m

ECT, >60° C

10 Seconds

Multiple
2 DCY

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.