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DTC P0122: Throttle Position Sensor Circuit - Low Input: Condition

DTC is set when Engine Control Module (ECM) detects Throttle Position (TP) sensor voltage is less than 0.1 volt for one second. MIL is illuminated when ECM detects malfunction during first drive cycle. Possible causes are:

ECM malfunction.
TP sensor malfunction.
TP sensor circuit malfunction.