P0121 Honda Hr-V
Throttle/Pedal Position Sensor A Range/Performance · Powertrain Code · High · Repair: Moderate
What is P0121?
The TPS is reading outside expected parameters for the current conditions.
When the Honda Hr-V triggers code P0121 (throttle/pedal position sensor a range/performance), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Honda Hr-V.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Honda Hr-V.
Common Causes on Honda Hr-V
- Worn Throttle Position Sensor (TPS) with dead spots
- Carbon buildup on electronic throttle body causing binding
- Corroded TPS wiring or connector
- Failing electronic throttle body motor
Symptoms
- Check Engine Light on
- Erratic idle speed
- Hesitation or surging during acceleration
- Throttle feels unresponsive or jerky
- Vehicle may enter limp mode
Notes for Honda Hr-V
Always perform the Honda idle relearn procedure after cleaning or replacing the throttle body — turn ignition on for 2 seconds, off for 10 seconds, repeat, then idle for 10 minutes.