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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1658 (5.7L CNG - DTCS P0507 To P1456 - 2500 Hd) >> DTC Troubleshooting >> P1199-Alternative Fuel Injector Power Relay Control Circuit 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 Powertrain Control Module (PCM) monitors the CNG Fuel Injector Relay for a stuck open or stuck closed condition; STUCK OPEN  - The stuck open condition is monitor with the currently engine running in gasoline fuel mode and CNG fuel mode is requested (CNG relay commanded closed). STUCK CLOSED  - The stuck closed condition is monitored with the engine running and fuel switch requested from CNG fuel mode to gasoline fuel mode (CNG relay commanded open).

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