Thanks to the advent of technology, just about every single part on your new Jeep JK Wrangler is wired up to a computer. And, if anything goes wrong with any one of these parts, your Jeep’s computer will make a note of it and/or even let you know about it by illuminating a Malfunction Indicator Light (MIL for short or ‘check engine’ light) or icons on your dash. Unfortunately, the MIL or other icons won’t tell you a whole lot other than the fact that your Jeep is having some kind of a problem and unless you take your Jeep into the dealership or have a OBDII reader handy, you’re pretty much out of luck, right? Wrong. As luck would have it, the JK Wrangler’s come with a Diagnostic Trouble Code (DTC) reader built right into the dash and you can access them by following the 3 simple steps below. Once you have the DTC code(s) in hand, check it/them against the list below and you will be able to find out exactly what problems your Jeep is having.
How to Read a DTC
A DTC or Diagnostic Trouble Code is made up of 5 digits the first of which is one of the following letters:
B - Body
C - Chasis
P - Power Train
U - Network
The 2nd digit indicates:
0 - SAE
1 - MFG
The 3rd digit indicates:
1 - Fuel & Air Metering
2 - Fuel & Air Metering (Injector Circuit)
3 - Injection Systems or Misfire
4 - Auxillary Emissions Control
5 - Vehicle Speed Control & Idle Control System
6 - Computer Output Circuit
7 - Transmission
8 - Transmission
The last 2 digits indicate:
Fault (00-99)
Instructions
1. To check your Jeep JK Wrangler’s DTC codes, simply insert your key into the ignition, turn it to the ‘ON’ position but do not start the engine. Then, push the key into the ignition cylinder and while holding it in, turn it to the ‘OFF’ position and then back to the ‘ON’ position (3) times straight making sure to end with it in the ‘ON’ position. It is important to keep pushing in on the key to prevent it from catching at the different positions along the way.
2. If you do step #1 correctly, all your dash lights will illuminate and your odometer will show up as a series of (6) dashes as shown in the pic to the left. If your Jeep JK Wrangler has any logged in any DTC’s, they will be displayed soon after the dashes appear. Write down the DTC(s) and check it/them against the list below to find out what they mean.
3. If your Jeep JK Wrangler has not logged in any DTC’s, the dashes on your odometer will be followed by the message ‘-done-’. Turn your key to the ‘OFF’ position and you will in fact be done.
Check Engine Codes List
B1402 - FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B1403 - FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1405 - FRONT RIGHT AUDIO SPEAKER OUTPUT CIRCUIT LOW
B1406 - FRONT RIGHT AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B1407 - FRONT RIGHT AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1409 - REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW
B140A - REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B140B - REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B140D - REAR RIGHT AUDIO SPEAKER OUTPUT CIRCUIT LOW
B140E - REAR RIGHT AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B140F - REAR RIGHT AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1420 - AUDIO CASSETTE ERROR/INOPERABLE CASSETTE
B1421 - AUDIO CD READ ERROR/INOPERABLE DISC
B1422 - AUDIO DVD READ ERROR/INOPERABLE DISC
B1423 - VES DVD READ ERROR/INOPERABLE DISC
B1424 - IMPROPER DVD-WRONG REGION
B1429 - RADIO DISPLAY HIGH TEMPERATURE
B142A - RADIO UNIT HIGH TEMPERATURE
B142C - VES VIDEO SCREEN DISCONNECTED
B142D - AUDIO ANTENNA NOT CONNECTED
B142E - GPS ANTENNA NOT CONNECTED
B142F - SATELLITE RADIO ANTENNA NOT CONNECTED
B1430 - SATELLITE RADIO ANTENNA INTERNAL PERFORMANCE
B1460 - CHANNEL 1 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE
B1461 - CHANNEL 1 AUDIO SPEAKER OUTPUT CIRCUIT LOW
B1462 - CHANNEL 1 AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B1463 - CHANNEL 1 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1464 - CHANNEL 1 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER
B1465 - CHANNEL 2 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE
B1466 - CHANNEL 2 AUDIO SPEAKER OUTPUT CIRCUIT LOW
B1467 - CHANNEL 2 AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B1468 - CHANNEL 2 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1469 - CHANNEL 2 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER
B146A - CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE
B146B - CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW
B146C - CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B146D - CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B146E - CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER
B146F - CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE
B1470 - CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW
B1471 - CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B1472 - CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1473 - CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER
B1474 - CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE
B1475 - CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT LOW
B1476 - CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B1477 - CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B1478 - CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER
B1479 - CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE
B147A - CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT LOW
B147B - CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT HIGH
B147C - CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B147D - CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER
B1613 - PANEL ILLUMINATION CONTROL CIRCUIT LOW
B1615 - PANEL ILLUMINATION CONTROL CIRCUIT OPEN
B161A - COURTESY/DOME LAMP CONTROL CIRCUIT
B161E - READING LAMP CONTROL CIRCUIT
B162B - LEFT LOW BEAM CONTROL CIRCUIT LOW
B162C - LT LOW BEAM CONTROL CKT HI
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
B1644 - RIGHT STOP LAMP CONTROL CIRCUIT HIGH
B1647 - REAR RIGHT TURN CONTROL CIRCUIT LOW
B1648 - REAR RIGHT TURN CONTROL CIRCUIT HIGH
B1663 - REAR FOG LAMP CONTROL CIRCUIT LOW
B1664 - REAR FOG LAMP CONTROL CIRCUIT HIGH
B166B - LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW
B166C - LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
B166F - RIGHT TRAILER TOW LAMP CONTROL CIRCUIT LOW
B1670 - RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
B16B1 - LEFT STOP LAMP CONTROL CIRCUIT HIGH
B16F8 - FRONT LEFT FOG LAMP CONTROL CIRCUIT LOW
B16F9 - FRONT LEFT FOG LAMP CONTROL CIRCUIT HIGH
B16FC - FRONT RIGHT FOG LAMP CONTROL CIRCUIT LOW
B16FD - FRONT RIGHT FOG LAMP CONTROL CIRCUIT HIGH
B17B8 - LEFT STOP LAMP CONTROL CIRCUIT OVERCURRENT
B17B9 - RIGHT STOP LAMP CONTROL CIRCUIT OVERCURRENT
B17BA - HEADLAMP LEVELING MOTOR CONTROL CIRCUIT OVERCURRENT
B17BF - LEFT SIDEMARKER LAMP CONTROL CIRCUIT OVERCURRENT
B17C4 - RIGHT SIDEMARKER LAMP CONTROL CIRCUIT OVERCURRENT
B1801 - DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT LOW - CLUSTER
B1806 - PASSENGER DOOR LOCK/UNLOCK SWITCH CIRCUIT LOW - TIPM
B1934 - DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK - CLUSTER
B1935 - PASSENGER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK - TIPM
B1A08 - RKE FOB 1 PERFORMANCE
B1A09 - RKE FOB 2 PERFORMANCE
B1A0A - RKE FOB 3 PERFORMANCE
B1A0B - RKE FOB 4 PERFORMANCE
B1A0C - RKE FOB 5 PERFORMANCE
B1A0D - RKE FOB 6 PERFORMANCE
B1A0E - RKE FOB 7 PERFORMANCE
B1A0F - RKE FOB 8 PERFORMANCE
B1A10 - RKE FOB 1 BATTERY LOW
B1A11 - RKE FOB 2 BATTERY LOW
B1A12 - RKE FOB 3 BATTERY LOW
B1A13 - RKE FOB 4 BATTERY LOW
B1A14 - RKE FOB 5 BATTERY LOW
B1A15 - RKE FOB 6 BATTERY LOW
B1A16 - RKE FOB 7 BATTERY LOW
B1A17 - RKE FOB 8 BATTERY LOW
B1A20 - PRE-ARM TIMEOUT
B1A23 - RKE RECEIVER PERFORMANCE
B1A24 - KEY NOT PROGRAMMED
B1A25 - INVALID KEY
B1A26 - MAXIMUM NUMBER OF KEYS PROGRAMMED
B1A27 - SKREEM PROGRAMMING PERFORMANCE
B1A28 - ECM MISMATCH WITH SKIM
B1A29 - SKIM BASESTATION MISMATCH
B1A3C - INTERNAL SIREN BATTERY
B1A3D - SIREN BATTERY / LOSS OF POWER SUPPLY
B1A3E - SIREN/ITM MISMATCH
B1A3F - ITM ARMING SEQUENCE PERFORMANCE
B1A48 - INTRUSION SENSOR 1 INTERNAL
B1A5F - INTRUSION SENSOR 2 INTERNAL
B1A6D - INTRUSION SENSOR 3 INTERNAL
B1B00 - DRIVER AIRBAG SQUIB 1 CIRCUIT LOW
B1B01 - DRIVER AIRBAG SQUIB 1 CIRCUIT HIGH
B1B02 - DRIVER AIRBAG SQUIB 1 CIRCUIT OPEN
B1B03 - DRIVER AIRBAG SQUIB 1 CIRCUIT SHORTED TOGETHER
B1B04 - DRIVER AIRBAG SQUIB 2 CIRCUIT LOW
B1B05 - DRIVER AIRBAG SQUIB 2 CIRCUIT HIGH
B1B06 - DRIVER AIRBAG SQUIB 2 CIRCUIT OPEN
B1B07 - DRIVER AIRBAG SQUIB 2 CIRCUIT SHORTED TOGETHER
B1B08 - PASSENGER AIRBAG SQUIB 1 CIRCUIT LOW
B1B09 - PASSENGER AIRBAG SQUIB 1 CIRCUIT HIGH
B1B0A - PASSENGER AIRBAG SQUIB 1 CIRCUIT OPEN
B1B0B - PASSENGER AIRBAG SQUIB 1 CIRCUIT SHORTED TOGETHER
B1B0C - PASSENGER AIRBAG SQUIB 2 CIRCUIT LOW
B1B0D - PASSENGER AIRBAG SQUIB 2 CIRCUIT HIGH
B1B0E - PASSENGER AIRBAG SQUIB 2 CIRCUIT OPEN
B1B0F - PASSENGER AIRBAG SQUIB 2 CIRCUITS SHORTED TOGETHER
B1B54 - 1ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT LOW
B1B55 - 1 ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT HIGH
B1B56 - 1 ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT OPEN
B1B70 - UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL
B1B71 - UP-FRONT RIGHT SATELLITE ACCELERATION SENSOR INTERNAL
B1B72 - LEFT SIDE SATELLITE ACCELERATION SENSOR 1 INTERNAL
B1B75 - RIGHT SIDE SATELLITE ACCELERATION SENSOR 1 INTERNAL
B1B78 - PASSENGER SEAT WEIGHT SENSOR 3 - LEFT FRONT PERFORMANCE
B1B79 - PASSENGER SEAT WEIGHT SENSOR 3 - LEFT FRONT INPUT CIRCUIT LOW
B1B7A - PASSENGER SEAT WEIGHT SENSOR 3 - LEFT FRONT INPUT CIRCUIT HIGH
B1B7D - PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT PERFORMANCE
B1B7E - PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW
B1B7F - PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH
B1B82 - PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE
B1B83 - PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR INPUT CIRCUIT LOW
B1B84 - PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR INPUT CIRCUIT HIGH
B1B87 - PASSENGER SEAT WEIGHT SENSOR 1 - RIGHT REAR PERFORMANCE
B1B88 - PASSENGER SEAT WEIGHT SENSOR 1 - RIGHT REAR INPUT CIRCUIT LOW
B1B89 - PASSENGER SEAT WEIGHT SENSOR 1 - RIGHT REAR INPUT CIRCUIT HIGH
B1B8D - DRIVER SEAT TRACK POSITION SENSOR CIRCUIT LOW
B1B8E - DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH
B1B8F - DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN
B1B93 - PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT LOW
B1B94 - PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT HIGH
B1B95 - PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT OPEN
B1BA5 - AIRBAG SQUIB CONFIGURATION MISMATCH
B1BA6 - OCCUPANT CLASSIFICATION UNDETERMINED
B1BA7 - OCCUPANT CLASSIFICATION SYSTEM VERIFICATION REQUIRED
B1BA8 - OCM SYSTEM OUT OF CALIBRATION/NOT CALIBRATED
B1BAA - OCCUPANT CLASSIFICATION MODULE CONFIGURATION MISMATCH
B1BBA - PASSENGER SEAT WEIGHT SENSOR SUPPLY CIRCUIT
B1BBB - PASSENGER SEAT WEIGHT SENSOR INPUTS SHORTED TOGETHER
B1BBC - OCS NEGATIVE SYSTEM WEIGHT
B1BBD - OCM CURRENT CONFIGURATION TABLE UNPROGRAMMED
B1BC7 - DEPLOYMENT DATA RECORD FULL
B1C27 - LEFT SIDE SEAT THORAX SQUIB 1 LOW
B1C28 - LEFT SIDE SEAT THORAX SQUIB 1 HIGH
B1C29 - LEFT SIDE SEAT THORAX SQUIB 1 OPEN
B1C2A - LEFT SIDE SEAT THORAX SQUIB 1 SHORTED TOGETHER
B1C2B - RIGHT SIDE SEAT THORAX SQUIB 1 LOW
B1C2C - RIGHT SIDE SEAT THORAX SQUIB 1 HIGH
B1C2D - RIGHT SIDE SEAT THORAX SQUIB 1 OPEN
B1C2E - RIGHT SIDE SEAT THORAX SQUIB 1 SHORTED TOGETHER
B1C38 - 1ST ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT LOW
B1C39 - 1ST ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT HIGH
B1C3A - 1ST ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT OPEN
B1C3B - 1ST ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT SHORTED TOGETHER
B1C47 - 1ST ROW PASSENGER RETRACTOR PRETENSIONER CIRCUIT LOW
B1C48 - 1ST ROW PASSENGER RETRACTOR PRETENSIONER CIRCUIT HIGH
B1C49 - 1ST ROW PASSENGER RETRACTOR PRETENSIONER CIRCUIT OPEN
B1C4A - 1ST ROW PASSENGER RETRACTOR PRETENSIONER CIRCUIT SHORTED TOGETHER
B2101 - IGNITION RUN/START INPUT CIRCUIT LOW
B2101 - IGNITION RUN/START INPUT CIRCUIT LOW
B2102 - IGNITION RUN/START INPUT CIRCUIT HIGH
B2102 - IGNITION RUN/START INPUT CIRCUIT HIGH
B210A - SYSTEM VOLTAGE LOW (WCM)
B210B - SYSTEM VOLTAGE HIGH (WCM)
B210D - BATTERY VOLTAGE LOW (WCM)
B210D - BATTERY VOLTAGE LOW
B210E - BATTERY VOLTAGE HIGH (WCM)
B210E - BATTERY VOLTAGE HIGH
B210E - BATTERY VOLTAGE HIGH
B210E - BATTERY VOLTAGE HIGH
B212C - IGNITION RUN/START INPUT CIRCUIT OPEN
B212D - IGNITION RUN ONLY INPUT CIRCUIT OPEN
B2142 - IGNITION OFF DRAW (IOD) FUSE NOT PRESENT
B219A - IGNITION UNLOCK RUN/START CONTROL CIRCUIT OVERCURRENT
B219F - IGNITION OFF DRAW (IOD) FUSE BLOWN
B2201 - CALIBRATION MISMATCH
B2204 - ECU CONFIGURATION MISMATCH
B2205 - ORIGINAL VIN MISSING/MISMATCH
B2205 - ORIGINAL VIN MISSING/MISMATCH
B2206 - CURRENT VIN MISSING/MISMATCH
B2206 - CURRENT VIN MISSING / MISMATCH
B2206 - CURRENT VIN MISSING / MISMATCH
B2207 - OCCUPANT RESTRAINT CONTROLLER INTERNAL 1
B2208 - OCCUPANT RESTRAINT CONTROLLER INTERNAL 2
B2209 - OCCUPANT RESTRAINT CONTROLLER INTERNAL 3
B220A - OCCUPANT RESTRAINT CONTROLLER INTERNAL 4
B220B - OCCUPANT RESTRAINT CONTROLLER FIRING STORED ENERGY
B220C - OCCUPANT RESTRAINT CONTROLLER ACCELEROMETER 1 INTERNAL
B220D - OCCUPANT RESTRAINT CONTROLLER ACCELEROMETER 2 INTERNAL
B2212 - OCCUPANT CLASSIFICATION MODULE INTERNAL
B2222 - SATELLITE RADIO RECEIVER INTERNAL
B2224 - SKREEM INTERNAL
B2229 - SKREEM INTERNAL - SKIM IMMOBILIZER
B222A - VEHICLE LINE MISMATCH
B222C - VEHICLE CONFIGURATION NOT PROGRAMMED
B223B - VEHICLE CONFIGURATION MISMATCH
B223B - VEHICLE CONFIGURATION MISMATCH
B223C - INTRUSION TRANSCEIVER MODULE INTERNAL
B223D - OCCUPANT CLASSIFICATION MODULE DTC PRESENT
B2254 - COLUMN LOCK MODULE INTERNAL
B2304 - WIPER PARK SWITCH INPUT CIRCUIT LOW
B2305 - WIPER PARK SWITCH INPUT CIRCUIT HIGH
B230D - REAR WIPER PARK SWITCH INPUT CIRCUIT LOW (STUCK LOW)
B230E - REAR WIPER PARK SWITCH INPUT CIRCUIT HIGH (STUCK HIGH)
B2323 - HEADLAMP WASHER MOTOR CONTROL CIRCUIT LOW
B2324 - HEADLAMP WASHER MOTOR CONTROL CIRCUIT HIGH
B2339 - HORN SWITCH STUCK
C0077 - LOW TIRE PRESSURE
C1404 - TRANSFER CASE RANGE POSITION SENSOR CIRCUIT LOW (TIPM)
C1405 - TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH (TIPM)
C1417 - FRONT DIFFERENTIAL CONTROL CIRCUIT LOW
C1418 - FRONT DIFFERENTIAL CONTROL CIRCUIT HIGH
C141D - REAR DIFFERENTIAL CONTROL CIRCUIT LOW
C141E - REAR DIFFERENTIAL CONTROL CIRCUIT HIGH
C1501 - TIRE PRESSURE SENSOR 1 INTERNAL
C1502 - TIRE PRESSURE SENSOR 2 INTERNAL
C1503 - TIRE PRESSURE SENSOR 3 INTERNAL
C1504 - TIRE PRESSURE SENSOR 4 INTERNAL
C2100 - BATTERY VOLTAGE LOW
C2101 - BATTERY VOLTAGE HIGH
C2207 - OFF ROAD ECU INTERNAL