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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1659 (5.7L CNG - DTCS P1457 To P2181 - 2500 Hd) >> DTC Troubleshooting >> P1E09-Closed Loop Fueling Not Achieved - Bank 1 Downstream >> Possible Causes

Possible Causes

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.
POSSIBLE CAUSES
FUEL DELIVERY SYSTEM
MAP SENSOR, WIRING, OR CONNECTORS
DOWNSTREAM O2 SENSOR, WIRING, OR CONNECTORS
ENGINE MECHANICAL SYSTEM
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .