Check engine light - JeepForum.com

 
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post #1 of 6 Old 08-23-2003, 06:21 PM Thread Starter
Willie1470
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Check engine light

I had my '98 Grand tuned up friday (22nd) and today when I drove it, the check engine light went on. I'm a novice but did the mechanic forget to do something? Thanks for all your help

Willie

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post #2 of 6 Old 08-23-2003, 08:53 PM
akins1400
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Very possible. Take it back and have him check the computer with a code scanner. That should tell him what he left loose. Probably a vacuum hose or an electric connector. You can also have your computer trouble codes checked at a parts store such as Auto Zone.
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post #3 of 6 Old 08-25-2003, 08:59 AM Thread Starter
Willie1470
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Quote:
Originally Posted by akins1400
Very possible. Take it back and have him check the computer with a code scanner. That should tell him what he left loose. Probably a vacuum hose or an electric connector. You can also have your computer trouble codes checked at a parts store such as Auto Zone.
Thanks! Went to mechanic to day, he ran the computer check and it showed up something to do with fuel compression (?), the gas cap was tightened, he also pushed a hose in tighter and everything seems okay. Thanks for helping out a novice....
Willie
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post #4 of 6 Old 08-27-2003, 10:48 PM
Angry Alan
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I'm having a similar problem. My 98 5.9L has been to my shop twice now for the Check Engine light. The light is solid, which is a good thing. The problem..

It keeps showing up!

I've had Output Speed Sensor replaced and it work fine for a week. Until the light came BACK on only a few days ago. I took it back to my shop, they hooked up the handheld code reader and the new problem was fixed. Not quite. The damn light came back on earlier today.

Has anyone else had these kind of problems?
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post #5 of 6 Old 09-02-2003, 11:55 AM
automan25
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Check the engine computer to see what codes are being stored. You can do this by turning the ignition on (don't start the motor, just turn the key to the on position), then off, then on again, then off, finally on a third time. After a few seconds the check engine light will flash the codes at you. Simple count how many times it flashes. The sequence will always begin and end with a 5. After the sequence is complete there will be a longer pause and then it will repeat. Here is what the sequence would be if you had codes 32 and 54 stored in the computer:

5-3-2-5-4-5

Write down the codes and check to see what they mean in a Haynes or Chilton manual.

1993 ZJ Limited 5.2 - no mods - Red with Gold (what were they thinking) trim.
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post #6 of 6 Old 09-02-2003, 02:43 PM
Fisher
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Quote:
Originally Posted by Angry Alan
I'm having a similar problem. My 98 5.9L has been to my shop twice now for the Check Engine light. The light is solid, which is a good thing. The problem..

It keeps showing up!

I've had Output Speed Sensor replaced and it work fine for a week. Until the light came BACK on only a few days ago. I took it back to my shop, they hooked up the handheld code reader and the new problem was fixed. Not quite. The damn light came back on earlier today.

Has anyone else had these kind of problems?
Yeah, Mine has been coming on and I've ended up changing two o2sensors (upstream and downstream) and also the idle position sensor.
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