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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (3.6L - DTCS P1129 To P2245) >> Diagnosis And Testing >> P1456-Fuel Tank Pressure Sensor Circuit Low >> Possible Causes

Possible Causes

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POSSIBLE CAUSES
(K859) 5-VOLT SUPPLY CIRCUIT OPEN
(K859) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(N7) FTP SIGNAL CIRCUIT SHORTED TO GROUND
(N7) FTP SIGNAL CIRCUIT SHORTED TO THE (K917) SENSOR GROUND CIRCUIT
EXCESSIVE RESISTANCE IN THE (N7) FTP SIGNAL CIRCUIT
FUEL TANK PRESSURE SENSOR (FTP)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .