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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1184 (3.6L - DTCS P0129 To P0365 - 1500) >> DTC Troubleshooting >> P0174-Fuel System 2/1 Lean >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2016 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
LOW FUEL PRESSURE OR VOLUME/RESTRICTED FUEL INJECTOR
ENGINE MECHANICAL - VACUUM LEAK
EXHAUST SYSTEM LEAK
LEAK IN THE PURGE FLOW SYSTEM
HIGH ETHANOL CONTENT (NON E85 VEHICLE)
FAULTY MAP SENSOR READING
O2 SENSOR WIRING ISSUE
O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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