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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 229 (5.7L - DTCS P058C To P1495 - 1500) >> Diagnosis And Testing >> P1457-Fuel Tank Pressure Sensor Circuit High >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
POSSIBLE CAUSES 
FTP SIGNAL CIRCUIT SHORTED TO VOLTAGE
FTP SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
FTP SIGNAL CIRCUIT SHORTED TO THE 5-VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN/HIGH RESISTANCE
FUEL TANK PRESSURE (FTP) SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  .