Wrench light Thank you for the info, can you tell me if this is going to be an expensive problem?

That's a service light. It's telling you that there is an issue with your vehicle that needs to be addressed. Take it to your dealer/service center of choice, or most auto parts stores can now pull those codes for you from your vehicle's on-board diagnostic computer and tell you what is wrong. Hopefully this info helps!

Yes it is a "service soon" light. It means something is wrong or up. You should have it checked at the dealer or an auto repair shop. :-) If the mileage is around 50,000 or 100,000 miles, the service light will likely come on. I think all cars do this. I think the dealers or the auto repair place can turn it off.

IT is module could be expensive for Grand Prix cost $500.00

Getting an accurate yellow Check Engine or Service Engine Soon light diagnosis is often frustrating and expensive. Fortunately, if you happen to be technically inclined and have the basic tools, it is likely that you can do the job yourself and avoid that expensive repair shop visit.

Try to scanned the PCM to know what fault code is stored there; sometimes Autozone or Autoshop with OBD Scanner Reader make this job for free.

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It's telling you that there is a problem with the 4x4 system and that you need to seek attention before it becomes expensive.

Go and get the codes read at a repair garage, preferably a Dodge franchised garage as they'll have the most up to date code reading info and the most experience in interpreting the information. Unfortunately this is a fault which cannot be diagnosed remotely on the sole basis of a warning light.

Once you know what the fault is you can decide what to do about it. It will not fix itself, though, and if you leave it unattended you could be looking at a broken car and a very expensive repair.

car has detected a problem with itself could be 1 of a hundred things auto parts store will pull code from car to tell you the problem with it

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It is reminding you to change the oil

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I assume you have no owners manual or never read it.

The wrench is a MIL Lamp--- a Malfunction Indicator Lamp
It tells you that something like a sensor or other issues,is out of range,as far as the PCM (Computer) sees it. When ever you get a check light,mil light,trac,abs ,etc,you go to a repair shop fairly soon,like a couple of days or so, and have the issues checked out. This will happen a couple times a year ,on most of todays vehicles,so get used to it,and expect to pay a diagnostic fee, plus repair

Wrench light, is "Service Engine Soon". Check light indicates there is a stored and current engine computer fault. Often referred to as a DTC,,,Detected Trouble Code. Stop by your Autozone or Advance Auto parts store and they can plug in a scanner that will tell what faults occured and possibly what you can do to take care of the problem,

The oxygen sensors are located on the engine exhaust manifold . The also could be one on the exhaust system past the catyllic convertor.
You need a wrench to remove the sensor and replace them by screwing them back in. The prolblem is the sensor sometimes welds on the exhaust system and almost impossible to remove with out correct equipment.
I would take to a local mechanic.
The repairs are fairly in expensive.