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       #Post#: 43--------------------------------------------------
       Checking Enigine Codes (JK)
       By: CburtJKU Date: February 12, 2018, 12:00 pm
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       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 - Auxiliary 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.
       See Check Engine Codes List in separate posts...
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