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Unread 05-01-2006, 12:46 PM   #1
Gunkel
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Check engine Light 03' 2.4 reset

The check engine light in my 03' TJ 2.4 will not shut off, when I run the self-diagnostic (trip reset hold, key on, release trip reset), after the firmware version (3.1), it lists the number 319468, then "no faults" before checking or setting all of the guage calibrations, when it is all said and done, the check engine light stays on. I have left the battery disconnected over the weekend, preformed the "adaptive memory reset" suggest by a member in a previous thread, all to no avail. Any recommentations or help would be greatly appreciated!

Greg

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Unread 05-06-2006, 09:16 AM   #2
Gunkel
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Bump...any ideas anyone? if not, I believe I will be headed for the dealer next week. I have checked everything I can think of.

Thanks..
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Unread 05-06-2006, 09:26 AM   #3
TAMUJeep
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sorry I'm not gonna be any help but I am having the same problem. Your not alone. I too am headed for the dealer...engine light + resr main leaking + AC not cold + 33K on an 04 = dealer trip!
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Unread 05-06-2006, 10:45 AM   #4
Katch
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Here's the solution

On my '02 TJ, that method of diagnostics only checks the diagnostics of your dashboard (it's probably the same on newer models). You need to plug in a diagnostic code reader thing to the plug below the steering wheel (it's the rectangular looking thing). No worries though....it's easy to do and it's free.

Go to an AutoZone store (others may do it too?), and they will let you borrow their reader for free. Just let them hold on to your driver's license. Just take it out to your Jeep and plug it in...and follow the instructions. It also lets you reset the codes. Some readers may only give you a number, but you can find what it means here on the net.

Steve
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Unread 05-06-2006, 03:24 PM   #5
plumcrazy
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got my code reader from harborfreighttools.com it also resets it for ya

i think i paid like $42 delivered
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Unread 05-06-2006, 04:35 PM   #6
otisdog
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On my 03 with the 4.0 I turn the key on and off three times to get the engine codes.
Jim
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Unread 05-06-2006, 11:45 PM   #7
Katch
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Quote:
Originally Posted by otisdog
On my 03 with the 4.0 I turn the key on and off three times to get the engine codes.
Jim
Has your check engine light come on? Have you actually gotten any codes other than the "no fault" code? I thought that with my '02, but the key turn test on the newer Jeeps only check the dash board. If yours goes through the cycle where each guage reads from 0 to max and all the dash lights cycles, then yours also does only the dash checks. You'll find out (if you buy the $100+ service manual) when your check engine light comes on the first time. I used to think the same thing on my '02 (4.0 L), until I got the famous emission leak problem.

Steve
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Unread 05-07-2006, 01:39 AM   #8
Gunkel
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Thanks everyone for the replies, I will head to autozone on Monday.
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Unread 05-07-2006, 08:18 AM   #9
builderpaul
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Turning off the light will do no good if you don't fix the reason it came on. As soon as you turn the truck back on it will detect the fault and turn the light back on again. Scan for the code and fixing the problem is the only way to keep the light off.
FYI: some codes are set with different driving cycles. Some will set upon the first fault detection some may need the fault detected several times before setting a code. A code reader will only read and delete the code. This can make diagnosing an intermittent problem difficult. A scanner is not much more money, it will also read pending codes and freeze frame data (what was happening when the code was set). This makes it easier to figure out those intermittent problems.
Just like an old school mechanic having to add a set a metric stuff to a tool box, todays mechanic must also have a toolbox of electronics diagnose equipment.
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Unread 05-07-2006, 08:26 AM   #10
sledog
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2002 Jeep Wrangler Sport; I had the same problem; the engine light came on; and i added a can Heet; which absorbed the moisture; thus the engine light went off and has stayed off. You might try that.
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Unread 05-07-2006, 08:28 AM   #11
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engine light

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Unread 05-07-2006, 08:45 AM   #12
otisdog
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Quote:
Originally Posted by Katch
Has your check engine light come on? Have you actually gotten any codes other than the "no fault" code? I thought that with my '02, but the key turn test on the newer Jeeps only check the dash board. If yours goes through the cycle where each guage reads from 0 to max and all the dash lights cycles, then yours also does only the dash checks. You'll find out (if you buy the $100+ service manual) when your check engine light comes on the first time. I used to think the same thing on my '02 (4.0 L), until I got the famous emission leak problem.

Steve
Yes - I had the check engine light come on and did the key three times thing. It displayed P0123 which turned out to be the TPS crapping out.
jim
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