P0103 on Audi: How to Diagnose & Fix
Mass or Volume Air Flow Circuit High Input
1 Audi model · 1 documented issue · 1 critical · $150-$600 repair
P0103 on Audi by model: symptoms, diagnosis and fix
On 2.8 V6 A8 models fitted with the AGA and ACK engines, engine misfiring may result in damage to the air grid in the air mass meter which could cause the grid to detach and jam the throttle valve. A jammed throttle can cause sudden loss of power control or a stuck-open throttle, presenting a serious drivability and safety risk. The MAF itself also commonly degrades, causing stalling, hesitation and limp mode with codes such as 16487 / P0103 (G70 signal too high).
Common Symptoms
- stalling
- engine misfire
- hesitation under acceleration
- throttle stuck or unresponsive
- check engine light
- limp mode
How to Fix
This was addressed under Australian recall PRA 1998/3629 (August 1998); owners of affected vehicles were contacted by the Australian distributor and directed to an Audi dealer for the recall repair. Out-of-recall vehicles should have the MAF (G70) sensor inspected and replaced if the screen is damaged — a Bosch/Hitachi OE-spec MAF runs roughly $150–$300 plus labor. Always clear adaptation values with VCDS after replacement and address any underlying misfire (coils, plugs) to prevent recurrence.
Sources for this issue (2)
P0103 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 P0103 mean on a Audi?
P0103 stands for "Mass or Volume Air Flow Circuit High Input." This generic code means the PCM detected a higher-than-expected signal voltage or airflow reading from the mass air flow (MAF) sensor circuit. Because the MAF reading directly affects fuel delivery, an abnormally high signal can cause the engine to run rich or behave erratically, with symptoms like rough running, hesitation, or poor fuel economy. It typically points to a sensor or wiring problem, or unmetered conditions confusing the sensor. On Audi it is documented across 1 model: A8.
What are the most common causes of P0103?
The most common causes of P0103 are: Faulty or contaminated mass air flow sensor, Short to voltage in the MAF signal wiring, Damaged connector or corroded terminals at the MAF, Intake/vacuum leak affecting the signal, Dirty MAF sensor element, Poor sensor ground, Faulty PCM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0103 on a Audi?
Published repair estimates on Audi range from $150 to $600 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.