P3653high severityPowertrain
GDI Injector Circuit Malfunction - Cylinder Specific
on 2019 Mazda Mazda3 2.5L I4 · FWD
What this code means
A GDI fuel injector has an electrical circuit fault. GDI injectors require high-voltage driver circuits for precise fuel delivery at extremely high pressures.
Symptoms
- Check Engine Light
- Misfire on affected cylinder
- Rough idle
- Loss of power
- Exhaust smell
- Catalyst damage risk
Common causes
- Injector coil failure
- Injector driver circuit fault in PCM
- Wiring damage to injector
- Connector pin corrosion
- Injector stuck open or closed
Diagnostic steps
- Identify affected cylinder from freeze frame
- Test injector resistance
- Check injector driver waveform with oscilloscope
- Inspect injector connector
- Swap injectors between cylinders to confirm
Repair notes
Replace faulty GDI injector. Use OEM injectors - aftermarket injectors may not meet flow and spray specifications. Perform injector coding if required.
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