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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