What does fault code P0121 mean?
Diagnostic trouble code P0121 is defined as Throttle/Pedal Position Sensor A Circuit Range/Performance. This standard OBD2 code is triggered when your car's powertrain or module sensor voltage deviates from calibrated safety tolerances.
Severity & Can I Drive With Code P0121?
Severity Rating: 4/5 (High Severity)
⚠️ Drivability Warning: Prolonged driving with this code is not recommended. Prompt repair is suggested to prevent secondary component damage.
Common Symptoms of P0121
- Unresponsive gas pedal
- Engine surging
- Limp home mode
Common Causes Ranked by Likelihood
- Dirty throttle body bore
- Failing Throttle Position Sensor (TPS)
- Wiring fault
DIY Repair & Troubleshooting Steps
- Clean throttle body butterfly valve
Professional Shop Repair & Estimated Cost Range
- Replace TPS or electronic throttle body assembly
Estimated Repair Cost Range: $120 - $500
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