LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (2.4L - DTCS P0443 To P1593) >> Diagnosis And Testing >> P1456-Fuel Tank Pressure Sensor Circuit Low >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
POSSIBLE CAUSES
(F856) 5-VOLT SUPPLY CIRCUIT OPEN
(F856) 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  .