LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2010 >> Commander Limited, 4WD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Front Control Module (FCM) - Electrical Diagnostics >> Diagnostic Code Index
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

DTC Description
B162B  LEFT LOW BEAM CONTROL CIRCUIT LOW
B162C  LEFT LOW BEAM CONTROL CIRCUIT HIGH
B162F  RIGHT LOW BEAM CONTROL CIRCUIT LOW
B1630  RIGHT LOW BEAM CONTROL CIRCUIT HIGH
B1633  LEFT HI BEAM CONTROL CIRCUIT LOW
B1634  LEFT HI BEAM CONTROL CIRCUIT HIGH
B1637  RIGHT HI BEAM CONTROL CIRCUIT LOW
B1638  RIGHT HI BEAM CONTROL CIRCUIT HIGH
B163B  FRONT LEFT TURN CONTROL CIRCUIT LOW
B163C  FRONT LEFT TURN CONTROL CIRCUIT HIGH
B163F  FRONT RIGHT TURN CONTROL CIRCUIT LOW
B1640  FRONT RIGHT TURN CONTROL CIRCUIT HIGH
B1643  REAR LEFT TURN CONTROL CIRCUIT LOW
B1644  REAR LEFT TURN CONTROL CIRCUIT HIGH
B1647  REAR RIGHT TURN CONTROL CIRCUIT LOW
B1648  REAR RIGHT TURN CONTROL CIRCUIT HIGH
B1659  FRONT FOG LAMP CONTROL CIRCUIT LOW
B165C  PARK LAMP CONTROL CIRCUIT LOW
B165D  PARK LAMP CONTROL CIRCUIT HIGH
B165E  PARK LAMP CONTROL CIRCUIT OPEN
B1660  FRONT FOG LAMP CONTROL CIRCUIT HIGH
B1661  FRONT FOG LAMP CONTROL CIRCUIT OPEN
B1667  REVERSE LAMP CONTROL CIRCUIT LOW
B1668  REVERSE LAMP CONTROL CIRCUIT HIGH
B166B  LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW
B166C  LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
B166D  LEFT TRAILER TOW LAMP CONTROL CIRCUIT OPEN
B166F  RIGHT TRAILER TOW LAMP CONTROL CIRCUIT LOW
B1670  RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
B1671  RIGHT TRAILER TOW LAMP CONTROL CIRCUIT OPEN
B1820  HOOD AJAR INPUT CIRCUIT HIGH
B1D4F  ADJUSTABLE PEDAL INHIBIT CIRCUIT LOW
B1D50  ADJUSTABLE PEDAL INHIBIT CIRCUIT HIGH
B1D51  ADJUSTABLE PEDAL INHIBIT CIRCUIT OPEN
B2100  IGNITION RUN/START INPUT CIRCUIT PERFORMANCE
B210D  BATTERY VOLTAGE LOW
B210E  BATTERY VOLTAGE HIGH
B2112  5 VOLT SUPPLY CIRCUIT LOW
B2113  5 VOLT SUPPLY CIRCUIT HIGH
B211A  IGNITION RUN/ACC/SPAD CONTROL CIRCUIT LOW
B211B  IGNITION RUN/ACC/SPAD CONTROL CIRCUIT HIGH
B211E  IGNITION RUN/ACC/PAD CONTROL CIRCUIT LOW
B211F  IGNITION RUN/ACC/PAD CONTROL CIRCUIT HIGH
B2122  IGNITION RUN CONTROL 1 CIRCUIT LOW
B2123  IGNITION RUN CONTROL 1 CIRCUIT HIGH
B2133  IGNITION RUN/START (REMOTE START) CONTROL CIRCUIT LOW
B2134  IGNITION RUN/START (REMOTE START) CONTROL CIRCUIT HIGH
B213F  IGNITION START (REMOTE START) CONTROL CIRCUIT LOW
B2140  IGNITION START (REMOTE START) CONTROL CIRCUIT HIGH
B2184  IGNITION UNLOCK RUN/START CONTROL CIRCUIT LOW
B2185  IGNITION UNLOCK RUN/START CONTROL CIRCUIT HIGH
B2206  CURRENT VIN MISSING/MISMATCH
B2215  FRONT CONTROL MODULE INTERNAL
B222C  VEHICLE CONFIGURATION NOT PROGRAMMED
B2336  HORN CONTROL CIRCUIT LOW
B2337  HORN CONTROL CIRCUIT HIGH
B2304  WIPER PARK SWITCH INPUT CIRCUIT LOW
B2305  WIPER PARK SWITCH INPUT CIRCUIT HIGH
B2313  WIPER ON/OFF CONTROL CIRCUIT LOW
B2314  WIPER ON/OFF CONTROL CIRCUIT HIGH
B2315  WIPER ON/OFF CONTROL CIRCUIT OPEN
B2317  WIPER HI/LOW CONTROL CIRCUIT LOW
B2318  WIPER HI/LOW CONTROL CIRCUIT HIGH
B2319  WIPER HI/LOW CONTROL CIRCUIT OPEN
B231F  FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW
B2320  FRONT/REAR WASHER MOTOR CONTROL CIRCUIT HIGH
B2328  WASHER FLUID LEVEL SENSOR INPUT CIRCUIT HIGH
B2805  HID HEADLAMP CONTROL CIRCUIT LOW
B2807  HID HEADLAMP CONTROL CIRCUIT OPEN
C1008  BRAKE FLUID LEVEL CIRCUIT HIGH
U0001  CAN C BUS CIRCUIT
U0021  CAN B BUS (+) CIRCUIT OPEN
U0022  CAN B BUS (+) CIRCUIT LOW
U0023  CAN B BUS (+) CIRCUIT HIGH
U0024  CAN B BUS (-) CIRCUIT OPEN
U0025  CAN B BUS (-) CIRCUIT LOW
U0026  CAN B BUS (-) CIRCUIT HIGH
U0027  CAN B BUS (-) SHORTED TO BUS (+)
U0100  LOST COMMUNICATION WITH ECM/PCM
U0101  LOST COMMUNICATION WITH TCM
U0103  LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE
U0114  LOST COMMUNICATION WITH FINAL DRIVE CONTROL MODULE
U0121  LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE
U0141  LOST COMMUNICATION WITH FRONT CONTROL MODULE
U0151  LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER (ORC)
U0155  LOST COMMUNICATION WITH CLUSTER/CCN
U0159  LOST COMMUNICATION WITH PARK ASSIST CONTROL MODULE
U0164  LOST COMMUNICATION WITH HVAC CONTROL MODULE
U0167  LOST COMMUNICATION WITH INTRUSION TRANSCEIVER CONTROL MODULE
U0168  LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (WIN)
U0169  LOST COMMUNICATION WITH SUNROOF CONTROL MODULE
U0181  LOST COMMUNICATION WITH HEADLAMP LEVELING TRANSLATOR (AHLM)
U0184  LOST COMMUNICATION WITH RADIO
U0186  LOST COMMUNICATION WITH AUDIO AMPLIFIER
U0196  LOST COMMUNICATION WITH VEHICLE ENTERTAINMENT CONTROL MODULE
U0197  LOST COMMUNICATION WITH HANDS FREE PHONE MODULE
U0199  LOST COMMUNICATION WITH DRIVER DOOR MODULE
U0200  LOST COMMUNICATION WITH PASSENGER DOOR MODULE
U0208  LOST COMMUNICATION WITH HEATED SEAT CONTROL MODULE
U0209  LOST COMMUNICATION WITH MEMORY SEAT CONTROL MODULE
U0212  LOST COMMUNICATION WITH SCCM - CAN B
U0230  LOST COMMUNICATION WITH POWER LIFTGATE MODULE
U0231  LOST COMMUNICATION WITH RAIN SENSING MODULE
U0241  LOST COMMUNICATION WITH AUTO HIGHBEAM HEADLAMP CONTROL MODULE
U0252  LOST COMMUNICATION WITH TRAILER LIGHTING MODULE
U1108  ADDITIONAL CAN B ECU DETECTED
U110A  LOST COMMUNICATION WITH SCCM - CAN C