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Home >> Jeep >> 2008 >> Commander Base, 4.7 N, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P0016 To P0125, Pre-Diagnostic Troubleshooting Procedure, Intermittent Condition >> P0121-Throttle Position Sensor 1 Performance >> Possible Causes
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Possible Causes

Possible Causes 
EXCESSIVE RESISTANCE IN THE (K22) TP SENSOR NO.1 SIGNAL CIRCUIT
EXCESSIVE RESISTANCE IN THE (K122) TP SENSOR NO.2 SIGNAL CIRCUIT
EXCESSIVE RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT
EXCESSIVE RESISTANCE IN THE (K922) TP SENSOR RETURN CIRCUIT
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO THE (K122) TP SENSOR NO.2 SIGNAL CIRCUIT
THROTTLE POSITION SENSOR/THROTTLE BODY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  before proceeding.