P2128
Throttle/Pedal Position Sensor/Switch E Circuit High
2003-2003 Mazda B2300 2.3L I4
Critical SeverityPowertrainGeneric (SAE)
The 2003 Mazda B2300 is equipped with a 2.3L inline-4 engine. Below you'll find detailed p2128 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 E.
Symptoms
- Limp mode
- Check engine light
- Possible unintended throttle input
Common Causes
- Open ground
- Short to voltage in harness
- Failed sensor
Diagnostic Steps
- Measure sensor E voltage
- Check ground circuit
- Inspect wiring
Repair Notes
Replace accelerator 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
P2128 on Other Vehicles
Common Questions
What does code P2128 mean on a 2003-2003 Mazda B2300?
P2128 stands for "Throttle/Pedal Position Sensor/Switch E Circuit High". High voltage from accelerator pedal position sensor E.
What are the symptoms of P2128 on a Mazda B2300?
Common symptoms of P2128 include: Limp mode, Check engine light, Possible unintended throttle input.
What causes P2128 on a 2003-2003 Mazda B2300?
Common causes of P2128 include: Open ground, Short to voltage in harness, Failed sensor.
Last updated: March 2026