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Installing 23,000 Volt Offroad Lights

What are HID Lights?

Onboard Air
Converting a York
AC Compressor
to Pump Air

Warn 9500i Winch Installation

HEI Ignition
Installation & Review

Lockers, Limited Slips &
other Differentials Explained

Jeep Dana 300 TeraLow - 4:1 Gearset for the Dana 300 Transfer Case

Jeep Trans Swap
T-18A Transmission Rebuild & Short Shaft Conversion

For all the Jeep
Fans out there!

Offroad Reports

Jeeps at Rausch Creek
Off-Road Park

Wheeling in the Valley of the Ferns

Paragon Adventure Park
Rock Krawl

1.jpg (70086 bytes)
Jeeps in Tellico NC

Thousands more
photos here..



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JEEP TJ Diagnostic Codes


How to display the codes:

  1. Turn the ignition key On - Off - On - Off - On within 5 seconds

  2. Count the number of times the check engine lamp on the dash flashes on and off.

    The number of flashes represents the trouble code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual two digit trouble codes.

Example: Lamp flashes 5 times, pauses, and flashes 5 more times. This indicates a code number 55. A code 55 will always be the last code to be displayed. This will indicate the end of all stored codes.

Also, the code numbers will be displayed on the vehicle's odometer. Each number will be displayed with a slight delay between numbers. Again, code 55 will always be the last code to be displayed. This method should work for Jeeps up to 1997.

Code Description
11 No crank reference signal detected during engine cranking.

Intermittent loss of either camshaft or crankshaft position sensor.

CKP sensor target windows have too much variation.
12 Direct battery input to PCM was disconnected within the last 50 Key-on cycles.
13 No difference recognized between the engine MAP reading and the barometric (atmosphere) pressure reading from start-up.
14 MAP sensor input above or below acceptable voltage.

5 volt output to MAP sensor open.
15 No vehicle speed sensor signal detected during road load conditions.
17 Engine did not reach operating temperature within acceptable limits.

Engine does not reach 20 F. within 5 minutes with a vehicle speed signal.
21 Upstream oxygen sensor response slower than minimum required switching frequency.

Upstream oxygen sensor heating element circuit malfunction.

Downstream oxygen sensor heating element circuit malfunction.

Downstream oxygen sensor input voltage maintained above the normal operating range.

Oxygen sensor voltage too low, tested after cold start. (Upstream or Downstream)

Left oxygen sensor input voltage maintained above the normal operating temperature.
22 Engine coolant temperature sensor above or below acceptable voltage.
23 Intake air temperature sensor input above or below acceptable voltage..
24 Throttle position sensor input above or below acceptable voltage.

TPS signal does not correlate to MAP sensor.
25 A shorted or open condition detected in one or more of the idle air control motor circuits.

Actual idle speed does not equal target idle speed.
27 Injector 3, and/or 4, and/or 5, and/or 6 output driver does not respond properly to the control signal.
31 An open or shorted condition detected in the A/C clutch relay circuit.

Insufficient or excessive vapor flow detected during evaporative emission system operation.
33 An open or shorted condition detected in the duty cycle purge solenoid circuit.
34 An open or shorted condition detected in the Speed Control vacuum or vent solenoid circuits.

Speed control switch input below the minimum acceptable voltage.
37 Relationship between engine speed and vehicle speed indicates no torque converter clutch engagement. Auto. only.
37 An open or shorted condition detected in the torque converter part throttle unlock solenoid control circuit. (3 speed auto RH trans. Only).

Incorrect input state detected for the Park/Neutral switch. Auto. only.
41 An open or shorted condition in the generator field control circuit.
42 An open or shorted condition detected in the auto shutdown relay circuit.

An open condition detected in the ASD relay output circuit.

An open or shorted condition detected in the fuel pump relay control circuit.

An open circuit between PCM and fuel gauge sending unit.

Circuit shorted to voltage between PCM and fuel gauge sending unit.

No movement of fuel level sender detected.
43 Peak primary circuit current not achieved with maximum dwell time.
43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
44 Battery temperature sensor in voltage above or below acceptable range.
46 Battery voltage sense input above target charging voltage during engine operation.
47 Battery voltage sense input below target charging during engine operation. Also, no significant change detected in battery voltage during active test of generator output circuit.
51 A lean air/fuel mixture has been indicated by an abnormally rich correction factor.
52 A rich air/fuel mixture has been indicated by an abnormally rich correction factor.
53 PCM Internal fault condition detected.
54 No camshaft signal detected during engine cranking.
55 Completion of fault code display on Check Engine lamp.
63 Unsuccessful attempt to write to an EEPROM location by the PCM.
64 Catalyst efficiency below required level. (Same as code 72)
65 Power steering high pressure seen at high speed. (2.5L only)
72 Catalyst efficiency below required level. (Same as code 64)
77 Malfunction detected with poser feed to speed control servo solenoids.

Click here to check for Technical Service Bulletins at ALLDATA.




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An ongoing Budgeted Rebuild/Build up of a Rock Crawling Machine.

Jeep Wrangler JK
Jeep JK Specs

Ramp Travel Index
RTI / Ramp Travel Index What it is and how to calculate it, with and without the ramp. the ramp.


Offroad Tire Info
P-Metric Tire Sizes Conversion to Inches
Tire Terminology
Wheel Terminology
How to Pick the Right
Tires for your Truck
Truck Tire Info
Tires - What Hits What Fits
All Terrain  Mud Terrain
Tire Reviews & Info
Mud Terrain MT Tire Reviews
All Terrain AT Tire Reviews
Super Swamper Bogger
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BFGoodrich Krawler
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Cooper Discoverer ST/C
Federal Couragia MT
Firestone Destination AT
Firestone Destination MT
General Grabber MT
General Grabber AT2
Green Diamond Icelander
Ground Hawg Mud Tire
Hankook Dynapro MT
Hankook Dynamic MT RT01
Hercules Terra Trac MT
Hercules Trail Digger MT
Kelly-Springfield Safari DTR
Kelly-Springfield Safari MSR
Kumho Road Venture MT
Kumho Road Venture KL71
Kumho Road Venture AT
Dick Cepek Mud Country
Dick Cepek F-C II
Dick Cepek Fun Country II
Dick Cepek Fun Country Nylon
Dick Cepek Fun Country Kevlar
Mastercraft Courser MT
Mastercraft Courser HTR
Mastercraft Courser HTR Plus
Maxxis BigHorn Radial
Maxxis Creepy Crawler
Maxxis Trepador
Maxxis Buckshot Mudder
Maxxis MA-SW
Maxxis M-8080 Mudzilla
Maxxis MT-754 Buckshot
Maxxis MT-753 Bravo
Maxxis MA-751 Bravo
Maxxis MA-S2 Marauder II
Maxxis MA-S1 Marauder
Maxxis MT-762 BigHorn
Nitto Mud Grappler
Nitto Terra Grappler
Nitto Dura Grappler
Nitto Dune Grappler
Nokian Vatiiva MT
Pit Bull Rocker Extreme
Pit Bull Maddog
Pit Bull Growler
Goodyear Wrangler MT/R
Pro Comp Xterrain
Pro Comp All Terrain
Pro Comp Mud Terrain
Pro Comp Xtreme AT
Pro Comp Xtreme MT
Toyo Open Country AT
Toyo Open Country MT
TrXus Mud Terrain
TrXus STS All Terrain
Michelin LTX A/T
Michelin LTX AT2 Press
Michelin LTX AT2
Mickey Thompson MTZ
Mickey Thompson MTX
Mickey Thompson Baja Claw Radial
Mickey Thompson Baja Claw Bias
Mickey Thompson Baja Crusher
Mickey Thompson Baja ATZ Radial SLT
Competition Claw
Dunlop Mud Rover
Federal Couragia M/T
Nitto Dura Grappler
Yokohama Geolandar
Dick Cepek's 2008 F-250 Super Duty Project Vehicle Project CRUSHER
Mud Tire Reviews

Strange and Unusual Vehicles & 4x4s

Jeep V8 Swap Tips

Offroaders Guide to Gearing up for Offroad
From Basic Equipment to Well Equipped.  An extensive list guide to help you prepare your vehicle for the offroad.

The Jeep Timeline

Jeep road car timeline, 1945 to Present  -  Jeep, A subsidiary of DaimlerChrysler

1940s 1950s 1960s 1970s 1980s 1990s 2000s
5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
Traditional CJ-2A
Wrangler YJ
  Wrangler TJ
                                                                        CJ-8                                   LJ      
                    CJ-5 - 1955-1983                                             Wrangler JK
                    CJ-6 - (stretched CJ-5) - 1955-1981                                                   JK Unlimited
                    Jeep DJ Postal / Dispatch Jeep / Surrey Gala Package                                                  
Mid SUV       VJ
                              C101 C104                                                       Liberty KJ
Large SUV                                     Wagoneer / Cherokee SJ Grand Wagoneer   Gr. Cherokee ZJ Gr. Cherokee WJ Gr. Cherokee WK
                                                                              Cherokee XJ         Commander
Pickup                                     Gladiator Honcho
                                    J-Series Pickups                                            
Truck                       Forward Control
FC-150, FC-170
                                  FJ-3, FJ-3A Fleetvan                                                                    
Crossover                                                                                                                             Compass
Other                           JEEP Concept Vehicles - Experimental, Prototype Concepts