P0605Lack of proper voltage and or ground to the PCM, Defective PCM ROM memory module, Defective PCM ground circuit(s), Defective PCM controlled output devices
⚙️ Powertrain (Motor y Transmisión)🏭 Specific to Audi
ROM de ECU fallida.
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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
La falla pertenece al grupo motopropulsor (motor y gestión electrónica).
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Symptoms You Will Notice
What you may observe when this code appears
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Possible Causes
The components or conditions that trigger this code
- 1ECU internal ROM fault
- 2Module software outdated, reflash may resolve
- 3Supply voltage outside specification
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How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1No arranca
- 2ECU defectuosa
- 3Reemplazar ECU
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
$100—$800
Varies by diagnosis
* Diagnosis only: $50–$150
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Quick Info
CodeP0605
CategoryMotor (P)
ManufacturerAudi
SeverityModerada
Symptoms4
Causes3
Solution steps3
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