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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1657 (5.7L CNG - DTCS P01A0 To P0506 - 2500 Hd) >> DTC Troubleshooting >> P01A4-Alternative Fuel Rail Pressure Sensor Performance >> When Monitored

When Monitored

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The monitor will run when the following enable conditions are met; 1. No CNG Rail Pressure Sensor circuit faults active; 2. Engine running; 3. Engine coolant temperature above -7°C (19.4°F) 4. CNG fuel mode commanded on; 5. CNG Relay energized; 6. A change in engine speed while in CNG fuel mode of more than 1500 RPMs; 7. A change in vehicle speed while in CNG fuel mode of more than 45 mph.