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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 >> P0172-Fuel System 1/1 Rich >> 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
EXCESSIVE FUEL PRESSURE OR POOR FUEL QUALITY/CONTAMINATION
FUEL INJECTOR LEAKING INTO ENGINE
LEAKING PURGE SOLENOID
ENGINE MECHANICAL - INTAKE SYSTEM RESTRICTED
EXHAUST SYSTEM RESTRICTION
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  .