P0123Honda RidgelineYears: 1996 - 2026
Throttle/Pedal Position Sensor/Switch A Circuit High Input
Reviewed by ASE Certified Technician
What does this mean?
Code P0123 indicates the TPS 'A' signal voltage is above the maximum expected threshold.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Honda Ridgeline models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
Advertisement (In-Article)
Common Causes
Faulty throttle position sensor (TPS)
Damaged, chafed, or broken wiring harness
Corroded or loose electrical connector
Symptoms to Watch For
- Check Engine Light is illuminated
- Poor acceleration or sluggish response
- Abnormally high idle speed
- Vehicle enters reduced power / limp mode
- Engine surging or fluctuating RPM