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P2501Alternator failure, Battery failure, Powertrain Control Module (PCM) failure, Wiring issue

⚙️ Powertrain (Motor y Transmisión)🏭 Specific to Audi
Moderada

The L-terminal feedback from the alternator reads above the upper limit — short to supply or open ground side. Charging diagnostics cannot run cleanly.

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Can I keep driving? With caution

You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.

Sistema Afectado

Motor · Powertrain

Vehículo despiece — Motor

La falla pertenece al grupo motopropulsor (motor y gestión electrónica).

Espacio para vendedores de repuestos

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Possible Causes

The components or conditions that trigger this code

  • 1L-terminal shorted to supply
  • 2Alternator regulator failed
  • 3Connector pins corroded - high contact resistance
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Estimated Cost

Approximate range in USD (varies by region and shop)

$100$800

Varies by diagnosis

* Diagnosis only: $50–$150

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