Cylinder 1 Fuel Injector Current Circuit
1997-2003 Audi A8 4.2L V8
Description
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
- Measure injector resistance and compare to specification
- Test injector current draw with inductive clamp
- Inspect wiring and connector
- 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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1225 on Other Vehicles
Common Questions
What does code P1225 mean on a 1997-2003 Audi A8?
P1225 stands for "Cylinder 1 Fuel Injector Current Circuit". 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.
What are the symptoms of P1225 on a Audi A8?
Common symptoms of P1225 include: Check Engine Light, Misfire on Cylinder 1, Rough idle, Poor acceleration.
What causes P1225 on a 1997-2003 Audi A8?
Common causes of P1225 include: Faulty fuel injector coil Cylinder 1, High-resistance connection in injector circuit, ECU injector driver degradation, Wiring damage.