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Lancer LS
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DTC P0121: Throttle Position Sensor Circuit Range/Performance Problem
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Troubleshooting Hints
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Troubleshooting Hints
The most likely causes for this DTC to be set are:
TP sensor failed or misadjusted.
Open or shorted TP sensor circuit or loose connector.
ECM (M/T) or PCM (A/T) failed.