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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 416 (5.7L CNG - DTCS P000B To P0203 - 2500 Hd) >> Diagnosis And Testing >> P01A1-Alternative 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 
ESIM 5-VOLT SUPPLY CIRCUIT OPEN/HIGH RESISTANCE
CNG TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
CNG TANK PRESSURE SENSOR SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
CNG RAIL SENSOR RETURN CIRCUIT OPEN/HIGH RESISTANCE
CNG TANK PRESSURE SENSOR
POWERTRAIN CONTROL MODULE

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