P2308high severityPowertrain
Ignition Coil H Secondary Circuit
on 2021 Mazda Mazda3 2.5L Turbo I4 · FWD
What this code means
Fault in ignition coil H secondary circuit (cylinder 8 on V8).
Symptoms
- Cylinder 8 misfire
- Check engine light
Common causes
- Failed coil
- Worn spark plug
Diagnostic steps
- Coil swap test
- Check plug condition
Repair notes
Replace coil and plug as needed.
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