P0507 on Audi: How to Diagnose & Fix
Idle Air Control System RPM Higher Than Expected
2 Audi models · 2 documented issues · $120-$350 repair
P0507 on Audi by model: symptoms, diagnosis and fix
The EA888 2.0 TFSI uses an integrated PCV (crankcase ventilation) valve in the valve cover whose rubber diaphragm and check valve are a known failure point across the engine family. When the diaphragm tears, the seal is lost and unmetered air enters, producing rough idle, possible whistling/screeching from the engine bay, a lean-running condition and sometimes increased oil consumption. It is a recurring, inexpensive-to-diagnose VW-Group fault that affects the SQ2's engine.
Common Symptoms
- Rough or unstable idle
- Whistling or screeching from engine bay
- Check engine light
- Lean-running condition
- Slightly increased oil consumption
How to Fix
Replace the PCV valve (or the valve-cover assembly that integrates it) with the latest revised part; some owners fit a catch-can to reduce recurrence. A quick field test — briefly covering the bleeder hole on the cap to see if idle stabilises or whistling stops — helps confirm before replacement.
Sources for this issue (1)
Audi TSB 2040644/6 covers a metallic whistling or grinding sound at warm idle, a sporadic MIL and possible P2279 or P0507 on 4.0 TFSI vehicles. A leak in the crankcase breather pressure-regulating module can cause the condition. Audi’s labor table explicitly includes the S8.
Common Symptoms
- Metallic whistle or grinding sound at warm idle
- Sporadic MIL with P2279 or P0507
How to Fix
Compare the sound with Audi’s reference condition and check whether opening the oil filler cap changes it. Read P2279/P0507 and rule out other intake leaks. When the sound matches and is affected by the filler-cap check, follow Audi’s oil-separator breather replacement procedure and renew required seals/consumables by VIN. Do not diagnose by oil-cap feel alone or order the former five-item parts list.
Sources for this issue (1)
P0507 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0507 mean on a Audi?
P0507 stands for "Idle Air Control System RPM Higher Than Expected." This code means the engine is idling faster than the computer's target idle speed, typically by a set margin such as 200 RPM above commanded. The engine control module manages idle by metering a small amount of air around the throttle plate (via an idle air control valve or electronic throttle), and when it can't bring the RPM down to target it flags this code. The most common real cause is unmetered air sneaking into the intake — a vacuum leak — that the computer can't compensate for. It generally indicates extra air entering the engine or a problem with the idle/throttle control system. On Audi it is documented across 2 models: SQ2, S8.
What are the most common causes of P0507?
The most common causes of P0507 are: Vacuum or intake air leak (hoses, gaskets, intake boot), Dirty or sticking throttle body or throttle plate, Faulty or stuck idle air control valve, Leaking intake manifold or throttle body gasket, Stuck-open PCV valve or cracked PCV hose, Dirty mass airflow sensor giving false readings, Failing throttle position sensor, Leaking brake booster or its vacuum hose. The specific cause varies by vehicle.
How much does it cost to fix P0507 on a Audi?
Published repair estimates on Audi range from $120 to $350 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0507 on a different make?
View P0507 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.