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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 418 (5.7L CNG - DTCS P060B To P2128 - 2500 Hd) >> 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 2500 HD and 2012 RAM Pickup. 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  .