P0203
Injector Circuit/Open - Cylinder 3
2014-2021 Mazda Mazda6 2.5L I4
Moderate SeverityPowertrainGeneric (SAE)
Description
Open circuit in the cylinder 3 fuel injector circuit.
Symptoms
- Check Engine Light
- Misfire cylinder 3
- Rough idle
Common Causes
- Faulty injector #3
- Open wiring
- PCM driver failure
Diagnostic Steps
- Test injector resistance
- Check wiring
- Swap injectors
Repair Notes
Replace injector #3 or repair wiring.
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
P0203 on Other Vehicles
Common Questions
What does code P0203 mean on a 2014-2021 Mazda Mazda6?
P0203 stands for "Injector Circuit/Open - Cylinder 3". Open circuit in the cylinder 3 fuel injector circuit.
What are the symptoms of P0203 on a Mazda Mazda6?
Common symptoms of P0203 include: Check Engine Light, Misfire cylinder 3, Rough idle.
What causes P0203 on a 2014-2021 Mazda Mazda6?
Common causes of P0203 include: Faulty injector #3, Open wiring, PCM driver failure.