P0340high severityPowertrain
Camshaft Position Sensor A Circuit Bank 1
on 2016 Mazda MX-5 Miata 2.0L I4 · RWD
What this code means
Malfunction in the camshaft position (CMP) sensor circuit for Bank 1.
Symptoms
- Check Engine Light
- Hard starting
- Rough running
- Stalling
- Misfire
Common causes
- Faulty CMP sensor
- Wiring damage
- Distributor issue (if equipped)
- Timing chain/belt issue
Diagnostic steps
- Test CMP sensor resistance
- Check wiring
- Scope CMP signal
- Check timing belt/chain
Repair notes
Replace CMP sensor. Check timing components.
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