P2123
Throttle/Pedal Position Sensor/Switch D Circuit High
2002-2002 Mazda B2300 2.3L I4
Critical SeverityPowertrainGeneric (SAE)
The 2002 Mazda B2300 is equipped with a 2.3L inline-4 engine. Below you'll find detailed p2123 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
High voltage from accelerator pedal position sensor D.
Symptoms
- Limp mode
- Unintended acceleration
- Check engine light
Common Causes
- Open ground circuit
- Short to voltage
- Failed sensor
Diagnostic Steps
- Measure voltage at APP sensor D
- Check for opens in ground
- Inspect wiring
Repair Notes
Replace pedal assembly 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
P2123 on Other Vehicles
Common Questions
What does code P2123 mean on a 2002-2002 Mazda B2300?
P2123 stands for "Throttle/Pedal Position Sensor/Switch D Circuit High". High voltage from accelerator pedal position sensor D.
What are the symptoms of P2123 on a Mazda B2300?
Common symptoms of P2123 include: Limp mode, Unintended acceleration, Check engine light.
What causes P2123 on a 2002-2002 Mazda B2300?
Common causes of P2123 include: Open ground circuit, Short to voltage, Failed sensor.
Last updated: March 2026