P0121 Moderate Powertrain

Throttle Position Sensor Range/Performance

Common Causes

Dirty or worn throttle position sensor
Carbon buildup on throttle body
Faulty TPS

Common Symptoms

Rough Idle Engine Hesitation on Acceleration Poor Fuel Economy

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Quick Info

Code P0121
System Powertrain
Severity Moderate

Disclaimer

This information is for diagnostic guidance only. Always verify repairs with a qualified technician before performing safety-critical work.

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