P3660high severityPowertrain
GDI Piezoelectric Injector Driver Circuit Fault
on 2017 Infiniti Q70 5.6L V8 · RWD
What this code means
The piezoelectric fuel injector driver circuit has a fault. Piezo injectors use crystal stack expansion for ultra-fast, precise fuel delivery in advanced GDI systems.
Symptoms
- Check Engine Light
- Misfire on affected cylinder
- Rough idle
- Reduced power
- Fuel smell from exhaust
- Catalyst damage risk if prolonged
Common causes
- Piezo driver circuit failure in PCM
- Injector piezo stack degradation
- Wiring open or short to injector
- Connector pin corrosion
- Injector capacitance out of range
Diagnostic steps
- Test injector capacitance with specialized tool
- Check driver circuit output waveform
- Measure injector wiring resistance
- Inspect connector for corrosion
- Swap injectors between cylinders to confirm
Repair notes
Replace piezoelectric injector. PCM replacement if driver circuit is faulty. Piezo injectors require specialized diagnostic equipment and are not interchangeable with solenoid-type GDI injectors.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1