2001 Maxima idle air control valve

[louie48]

My 2001 Maxima was idleing fast (1500 RPM) It also pulsed from 1500-2000 RPM. The service code was P0505. My mechanic tried to reset the computer. . He also reprogrammed the computer to the current software. He then tried to clean the Idle Air Control valve. All to no avail. He then determined the IACV had a bad servo. He replaced the IACV with a new unit. The problem persisted. Now he says (after consulting with Nissan) that when the IACV servo motor goes bad it burns out a circuit in the computer. He is calling for a new ECM. Nissan says this happens also when the sensor on the engine mount fails. Is all this possible?

[MaximA32]

It is indeed possible. Make sure they check the motor mounts as well as this is the probable cause of the ECM going bad. I have done a few of these myself and at first, they were difficult to diagnose. I then spoke to a fellow tech and he informed me of the proper procedure.

[max_bobby]

Hey there,

I have a couple of questions.

I just started to have the same problems with my Max. When they checked the computer it did not indicate any codes as of yet. If I just change the valve will that correct the problem. According to my dealership I need to change the Idle control Valve, Engine mounts front and rear, and the computer. If it is not fixed what can happen to the engine? I'm not sure if I should just sell the car, in case other stuff starts to happen.

thanks

[MaximA32]

Once you replace those, you should have no issues with the car outside of general maintainence.

[SigEp148]

Kenny,

I have the same issue with the IACV and ECM with my 2001 Maxima. As far as the Engine Mounts go what am I looking for? How is the Engine mounts and the IACV & ECM inter-related? I just replaced the IACV and looking for fair and reasonable price for a ECM. What do I need to be aware of? Ebay has them for around $250 programed to your VIN#. Is there anywhere I may be able to find used/rebuilt/reprogramed one? Or is there anyway to repair the one that shorted out?In addtion, I recently found Free FSM on some .net formum/website but cannot locate it again. Do you happen to know where I can find FSM for 2001 Maxima online (not Chilton & not Haynes) for free. I may have to go to the library.

[MaximA32]

There isn't any way to repair the shorted out ECM. The only way is to replace the ECM. As for what your looking for on the motor mounts, I'll ask a fellow tech at work because he is the one who always seems to end up with those jobs.

[SigEp148]

Kenny- I replaced the IACV and it was high idling again and after a week of driving it would no longer idle or returned to its previous state. I realize I need a new ECM, but did I just damage the new IACV I put in a week ago? Any word with sensors on the Engine Mounts? Is the Idle Speed Control Motor the same as IACV? Is there a way I can contact your co-worker directly b/c I may have more issues than just the IACV and ECM...

Thanks,Ryan