P2122
Throttle/Pedal Position Sensor/Switch D Circuit Low
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 p2122 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Low voltage from accelerator pedal position sensor D.
Symptoms
- Limp mode
- Engine at idle
- Check engine light
Common Causes
- Failed APP sensor
- Short to ground in wiring
- Corroded connector
Diagnostic Steps
- Measure voltage at APP sensor D
- Check wiring
- Swap sensor if dual-assembly
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
P2122 on Other Vehicles
Common Questions
What does code P2122 mean on a 2003-2003 Mazda B2300?
P2122 stands for "Throttle/Pedal Position Sensor/Switch D Circuit Low". Low voltage from accelerator pedal position sensor D.
What are the symptoms of P2122 on a Mazda B2300?
Common symptoms of P2122 include: Limp mode, Engine at idle, Check engine light.
What causes P2122 on a 2003-2003 Mazda B2300?
Common causes of P2122 include: Failed APP sensor, Short to ground in wiring, Corroded connector.
Last updated: March 2026