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Old 12-28-2012, 06:40 AM   #1
Daginni's Avatar
Join Date: Jul 2012
Posts: 64
Check Gauge Light on, engine louder, making questionable noises.

2005 Jeep Wrangler, 4.0L, 6 Cylinder, Automatic Trans.

These problems could be related, or unrelated. I am not sure. Also, it is winter.

Every time I turn my Wrangler on when the engine hasn't been on in a few hours/cool, the Oil Pressure Gauge will not respond, a check gauge light pops up. It requires that I restart the vehicle. After doing so, Oil Pressure Gauge responds normally, check gauge light turns off.

Meanwhile, my friends have told me my engine is 'louder'. As in it sounds like it's simply running a lot louder than normal. He also said he heard it 'clunk' once (while that Check Gauge Light was on), but I been driving the thing around and listening to it (while Check Gauge Light is off) and havent heard any 'clunking'. It's just noticably louder. I have installed a K&N Air Filter to it, but that has been about a year ago. I don't recall it being so noisy as it has been during the winter months.

Last, in the back of the engine compartment, I hear a soft clacking noise. I have no idea what to make of it, but maybe it will make sense to someone else.

Past that, everything normal. It maintains a normal RPM at Idle, and has no problem with driving. I am going to change the oil out, and replace the Oil Pressure Gauge and see how that goes. But if you guys can identify these problems as something else, or god forbid something major. Please tell me.

Also going to see if I can get the engine to run after work with the check gauge light on and listen/prod it, and see if the engine is acting abnormal while the error is happening. Then I am going to Autozone to find out what errors are happening.

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Old 12-28-2012, 09:03 AM   #2
Join Date: Mar 2011
Posts: 428
"Louder" is probably an exhaust leak. You need to find and fix that immediately before you have a fire.

1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Rubicon TJ
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Old 12-28-2012, 09:11 AM   #3
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Join Date: Jul 2012
Posts: 64
Originally Posted by KaiserJeep View Post
"Louder" is probably an exhaust leak. You need to find and fix that immediately before you have a fire.
Simple, and makes more sense than anything else I've been hearing and I agree that it should be fixed ASAP.

The exhaust system is old and rusting and I wouldn't be surprised if it's the source. It's about time it got replaced anyways.

I'll have the mechanic take a closer look at the problem and see his opinion on it after work.

A exaust leak fix should run around $200-$300 correct? At least, depending on the location of the leak.
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Old 12-28-2012, 11:25 AM   #4
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Join Date: Jul 2012
Posts: 64
Now. For that Sensor. I keep getting told "Don't worry about it, it is the infamous Pressure Sensor Error and means nothing". It has happened ever since I got the Jeep, and I admit, I never really did anything about it as a majority of the time it works fine, and when it does fail, a simply vehicle restart will fix it.

So if it's so infamous, how do I fix it? Simply replace the sensor, and check for clogging of hoses?
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Old 12-29-2012, 12:02 AM   #5
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Join Date: Sep 2012
Location: SoCal Desert
Posts: 334
If your CEL (check engine light) comes on, you can view the code easily. Put your key in the ignition and turn it to the On position (but do not turn the engine over). Do this three+ times in about three seconds (the point is to be quick). On the final turn, leave the key in the On position and the code(s) will cycle through on the odometer readout until it's done giving the code(s). The code will look something like this: P 045. If you don't get it the first time, try a couple more times. Took me a few tries to learn the trick of it. This works even if your CEL is no longer lit up. The code is recorded and stays there until it's cleared. Go ahead and try it and share the code here.
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