P0121High Priority
Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
Category: Powertrain• Fuel and Air Metering
1 articles · 1 makes affected
What is P0121?
Throttle Position Sensor (TPS) Range/Performance. The TPS signal doesn't correlate with expected throttle movement, indicating sensor wear or calibration issues.
Symptoms You May Notice
- ●Check engine light
- ●Hesitation on acceleration
- ●Surging at steady speeds
- ●Poor idle quality
- ●Transmission problems
How to Fix It
- ●Replace TPS ($100-$300, intermediate)
- ●Clean throttle body ($80-$200, beginner)
- ●Calibrate TPS (if adjustable) ($50-$150, intermediate)
Owner Statistics
Based on 1,131 real owner discussions • 56 confirmed solutions
$2,058
Average Repair Cost
5%
Success Rate
24%
DIY Repairs
1,131
Data Sources
About This Data
Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.
Frequently Appears With
These codes often appear together in owner reports. Check these if you see P0121.
Based on analysis of 2 owner reports where multiple codes appeared together.