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2009 AUDI A4
3.2L V6•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor506Torque3228Fluid9DTC1087Battery1Maintenance0Recalls2
P1225high severityPowertrain

Cylinder 1 Fuel Injector Current Circuit

on 2009 Audi A4 3.2L V6 · AWD

What this code means

The ECU detected that the current draw of the Cylinder 1 fuel injector is outside the expected range. The injector coil may be partially shorted or open, affecting fuel delivery accuracy.

Symptoms

  • Check Engine Light
  • Misfire on Cylinder 1
  • Rough idle
  • Poor acceleration

Common causes

  • Faulty fuel injector coil Cylinder 1
  • High-resistance connection in injector circuit
  • ECU injector driver degradation
  • Wiring damage

Diagnostic steps

  1. Measure injector resistance and compare to specification
  2. Test injector current draw with inductive clamp
  3. Inspect wiring and connector
  4. Swap injector to another cylinder to confirm fault follows

Repair notes

Replace the fuel injector on Cylinder 1 if current draw is out of specification.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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