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Home >> Chrysler >> 2021 >> Voyager LXi, Gas >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P060D To P1056 >> Diagnosis And Testing >> P0643-Sensor Reference Voltage 1 Circuit High >> Possible Causes

Possible Causes

Possible Causes
(F855) 5-VOLT SUPPLY SHORTED TO VOLTAGE
(K852) 5-VOLT SUPPLY SHORTED TO VOLTAGE
POWERTRAIN CONTROL MODULE (PCM)

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

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