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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 950 (5.7L CNG - DTCS P000B To P0202 - 2500 Hd) >> Diagnosis And Testing >> P01A9-Alternative Fuel Rail System Pressure Too High >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
EXCESSIVE RESISTANCE IN THE CNG RAIL PRESSURE SENSOR SIGNAL CIRCUIT
EXCESSIVE RESISTANCE IN THE CNG RAIL SENSOR RETURN CIRCUIT
CNG RAIL SENSOR
CNG PRESSURE REGULATOR

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

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