P0523
Engine Oil Pressure Sensor/Switch High Input
2003-2003 Mazda B2300 2.3L I4
Moderate SeverityPowertrainGeneric (SAE)
The 2003 Mazda B2300 is equipped with a 2.3L inline-4 engine. Below you'll find detailed p0523 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
High voltage from oil pressure sensor.
Symptoms
- Very high oil pressure reading
- Warning light on
Common Causes
- Open circuit
- Short to power
- Faulty sensor
Diagnostic Steps
- Test with mechanical gauge
- Test circuit voltage
- Test sensor
Repair Notes
Replace sensor if actual pressure is normal.
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
P0523 on Other Vehicles
Common Questions
What does code P0523 mean on a 2003-2003 Mazda B2300?
P0523 stands for "Engine Oil Pressure Sensor/Switch High Input". High voltage from oil pressure sensor.
What are the symptoms of P0523 on a Mazda B2300?
Common symptoms of P0523 include: Very high oil pressure reading, Warning light on.
What causes P0523 on a 2003-2003 Mazda B2300?
Common causes of P0523 include: Open circuit, Short to power, Faulty sensor.
Last updated: March 2026