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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1573 (6.7L Diesel - DTCS P065A To P209F - 2500 Hd) >> DTC Troubleshooting >> P0686-ECM Main Control Circuit Low >> 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
VGT 12-VOLT SUPPLY CIRCUIT SHORT TO GROUND
VGT 12-VOLT SUPPLY CIRCUIT SHORT TO VGT RETURN CIRCUIT
VGT 12-VOLT SUPPLY CIRCUIT OPEN/HIGH RESISTANCE
VGT ACTUATOR ASSEMBLY
SCR RELAY 1 12-VOLT SUPPLY FUSE BLOWN
SCR MODULE HEATER SUPPLY CIRCUIT SHORT TO VOLTAGE
SCR MODULE HEATER SUPPLY CIRCUIT SHORT TO GROUND
SCR MODULE HEATER SUPPLY CIRCUIT OPEN/HIGH RESISTANCE
POWER DISTRIBUTION CENTER
DEF DOSING CONTROL UNIT
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .