P0340
Camshaft Position Sensor A Circuit Bank 1
2003-2003 Mazda B2300 2.3L I4
High SeverityPowertrainGeneric (SAE)
The 2003 Mazda B2300 is equipped with a 2.3L inline-4 engine. Below you'll find detailed p0340 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
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.
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
P0340 on Other Vehicles
Common Questions
What does code P0340 mean on a 2003-2003 Mazda B2300?
P0340 stands for "Camshaft Position Sensor A Circuit Bank 1". Malfunction in the camshaft position (CMP) sensor circuit for Bank 1.
What are the symptoms of P0340 on a Mazda B2300?
Common symptoms of P0340 include: Check Engine Light, Hard starting, Rough running, Stalling, Misfire.
What causes P0340 on a 2003-2003 Mazda B2300?
Common causes of P0340 include: Faulty CMP sensor, Wiring damage, Distributor issue (if equipped), Timing chain/belt issue.
Last updated: March 2026