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Home >> Jeep >> 2016 >> Wrangler Rubicon, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P000A To P0155 >> DTC Troubleshooting >> P0121-Throttle Position Sensor 1 Performance >> Possible Causes

Possible Causes

Possible Causes
HIGH RESISTANCE IN THE TPS 1 SIGNAL CIRCUIT
HIGH RESISTANCE IN THE 5-VOLT SUPPLY CIRCUIT
HIGH RESISTANCE IN THE TPS RETURN CIRCUIT
THROTTLE BODY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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