P0511 Code: Closed Throttle Position Switch (P0511)
Note: We do not currently have verified model-specific diagnostic data for the Audi A6. The symptoms and fixes listed below are the standard generic OBD2 guidelines for the P0511 code. Always consult a factory service manual before replacing parts.
What does this mean?
Code P0511 relates to the closed throttle position switch circuit.
Diagnostic system: Idle speed and throttle control
On a Audi A6, the P0511 code should be diagnosed as part of the idle speed and throttle control group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Audi A6
- Faulty throttle position sensor (TPS)
- Dirty or faulty throttle body
- Damaged, chafed, or broken wiring harness
Symptoms to Watch For
- Check Engine Light is illuminated
- Abnormally high idle speed
- Rough or unstable idle
- Erratic or fluctuating idle speed
Before replacing parts, check these first
- Inspect intake leaks and throttle body carbon buildup.
- Check idle air or electronic throttle live data.
- Verify battery voltage and recent relearn procedures if the throttle body was cleaned or replaced.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
How to Diagnose
Common Mistakes
Replacing throttle parts before cleaning, checking air leaks, and completing the correct idle relearn. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
Frequently Asked Questions
Can I drive with the P0511 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0511 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0511 code, your Audi will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0511?
Inspect intake leaks and throttle body carbon buildup. Check idle air or electronic throttle live data. Verify battery voltage and recent relearn procedures if the throttle body was cleaned or replaced.
Join the Discussion
Repair Estimate
Fuse, connector, wiring, cleaning, or basic inspection
Major component replacement after live data and circuit tests confirm failure
Includes parts and labor. May vary by location.
Cleaning and relearn are cheap; actuator or throttle body replacement should be data-confirmed.
DIY Difficulty
Can usually be performed at home with basic hand tools.