CEL light code P0507 - Idle Speed Control System RPM Higher Than Expected

Any help/advice is appreciated. I already changed my throttle body and that did nothing. Thank you.

 

complete info about the car would help,year,milage,maintenance history...etc..

 

go to the dealer they did mine for 90.00

 

my mechanic said i need to go to the dealer to fix the problem after he changed my throttle body and did not fix the issue. 2003 GXE with 68k miles. no other major maintenance or defects with the car. the most maintenance i've done is oil changes love this car! The car is 100% stock. no upgrades, add-ons, or after market parts anywhere on the car.

 

there is an idle relearn procedure to do. the owens family site and im sure if u search you'll find it. I had the same thing on my 03, its hard to get the timing right when u do it. it was pretty neat after my 4th try i fired my car up idle was at 750rpm and cel was gone never to return again! thought i needed a new tb but tried this first, thank god didnt cost a cent good luck!

 

Nothing worked on my car, Then I did the injector trick and it went away and I was freaking shocked!!!

 

If that is the only code from a 2002-2003, you can try the idle air volume relearn procedure.

Tough to read, find the FSM and look in the EC.pdf.

Without CONSULT-II
NFEC1188S0302
NOTE:
I It is better to count the time accurately with a clock.
I It is impossible to switch the diagnostic mode when an
accelerator pedal position sensor circuit has a malfunc-
tion.
NOTE:
Before perform “Idle Air Volume Learning”, make sure that “Accel-
erator Pedal Released Position Learning” and “Throttle Valve
Closed Position Learning” are completed.
If not, perform “Accelerator Pedal Released Position Learning”,
EC-71 and “Throttle Valve Closed Position Learning”, EC-71.
1. Start engine and warm it up to normal operating temperature.
2. Check that all items listed under the topic “PRE-CONDITION-
ING” (previously mentioned) are in good order.
3. Turn ignition switch “OFF” and wait at least 10 seconds.
4. Confirm that accelerator pedal is fully released, turn ignition
switch “ON” and wait 3 seconds.
5. Repeat the following procedure quickly five times within 5 sec-
onds.
1) Fully depress the accelerator pedal.
2) Fully release the accelerator pedal.
6. Wait 7 seconds, fully depress the accelerator pedal and keep
it for approx. 20 seconds until the MIL goes off.
7. Fully release the accelerator pedal within 3 seconds after the
MIL goes off.
8. Start engine and let it idle.
9. Wait 20 seconds.
SEC897C
10. Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.
ITEM SPECIFICATION
Idle speed
MT: 625±50 rpm
AT: 675±50 rpm (in “P” or “N” position)
Ignition timing
MT: 15±5° BTDC
AT: 15±5° BTDC (in “P” or “N” position)
11. If idle speed and ignition timing are not within the specification,
the result will be incomplete. In this case, find the cause of the
incident by referring to the “Diagnostic Procedure” below.
 
DIAGNOSTIC PROCEDURE NFEC1188
If idle air volume learning cannot be performed successfull
proceed as follows:
1. Check that throttle valve is fully closed.
2. Check PCV valve operation.
3. Check that downstream of throttle valve is free from a
leakage.
4. When the above three items check out OK, engine com
ponent parts and their installation condition are question
able. Check and eliminate the cause of the incident.
It is useful to perform EC-152, “TROUBLE DIAGNOSIS
SPECIFICATION VALUE”.
5. If any of the following conditions occur after the engin
has started, eliminate the cause of the incident and pe
form “Idle air volume learning” all over again:
− Engine stalls.
− Erroneous idle.

 

Unable to recall this method and/or find a thread on it. Would you elaborate?

I just replaced valve covers/gaskets/plugs and cleaned out the intake plenum while it was off the car. Idles at 1k now and relearn procedure did not take after 2 tries...

 

Nevermind. Found it...

 

Bump..
I have tried all of the relearns (and all of the variations of them) but nothing has seemed to work. When I tried the injector trick, I first unplugged two but my idle was the same. When I unplugged the third one it completely cut the engine..
I have not gone to the dealer (yet) to see if the consult II would actually work but obviously want do everything in my power first. Any other suggestions?

 

SOLVED!!!!!!!
So before I was unplugging the fuel injectors while the car was idling and the idle was still around 1k. I read on some other forum that it can also be done if the fuel injectors (2 in my case). After unplugging it while the car was off, I did the relearn and the ECU finally took it! I shut to the car off, replugged the injectors and redid the relearn and it was still around 650 rpm.
I am sure this will help someone in the future after they ignorantly clean their TB (and move their butterfly valve).

 

I started the car and drove it around until operating temperature, then parked on my driveway. I unplugged all 3 of the front fuel injectors to force the idle lower. A check engine light obviously came on, so I shut the engine off and did the ecu reset procedure. With the engine still off, I did the air idle relearn procedure. It is important that you do not turn the engine on before doing the idle relearn because it will throw a CEL due to the unplugged injectors, and the idle relearn will fail. Well wadda ya know, the idle is right at 6-- rpm.
It took the relearn.

I hooked up the 3 injectors again and did another relearn just incase, and it took fine.

So anyone who is having problems doing an air idle relearn, please try disconnecting 2 or 3 of the injectors and try the relearn again before you let the dealer rape you on the price of a new throttle body.


------


This is probably the best info I've contributed on this forum lol. people still email me for this TSB

 

Hi,
I have the same issue with my 03 Maxima; I changed the plugs and now I have to do the relearn of Air Idle Relearn Procedure. When the manifold was off the car; I cleaned the air intake, and unfortunately manually moved the butterfly valve opening. So i'm hoping i'm not out of luck relearning the air idle. Can someone please confirm this?

Also can someone clear something up for me? What are the steps when you disconnect the Fuel Injectors and reset the air idle relearn procedure?

1. Disconnect the Fuel Injectors when car is running.
2. Shut off ignition.
3. Do the "ECU Reset Procedure" http://www.nicoclub.com/archives/maxima-reset-ecu.html
4. Without starting the car perform the "Air Idle Relearn Procedure"
5. Reconnect - Fuel Injector?
6. Start the car?

Are steps 5 & 6 correct? How does the computer know when the Fuel Injectors are disconnected to lower the RMP, when the car is not running?? I do not have Consult II monitor and the instructions in the bulletin involve disconnecting and resetting the "Air Idle Relearn Procedure" while the car is running.

Also my Max is throwing the P1800 and P0507, codes which may prevent the "Air Idle Relearn Procedure" from taking hold. Would that be correct?

Any feedback would be greatly appreciated.

Thanks

 

I was having the dreaded high Idle Rpm, but was able to get ECM to take relearn after blocking air intake to the required rpm, then doing a relearn using Car Gauge Pro (android app) with Elm327 bluetooth adapter. Seems that the ecm will not take a relearn until the RPM is 800 rpm or below. Tried the disconnecting of the injectors, but once they were reconnected went back to high rpm. Here is a link on the subject. Worked great for me and I hope it helps others as I was stumped for weeks...Now Idle and timing are were they are supposed to be....

 

Does anyone know the procedure for doing it with the Car Gauge Pro & Bluetooth OBD2 connector?

I (like everyone else) moved the throttle plate in my 03 and have had a 900-1k idle ever since, with CEL.

Do I unhook the 3 injectors, shut off the car, clear the ECU, push the relearn button and then start the car on only 3cyl? Do I plug in the injectors while the car is running, or do I shut it off and then plug them in?

Any help would be appreciated!

 

Bump. Still trying to figure this out.

When I leave the car idling and select idle relearn it fails every time. When I select it when the car is off, it says it was successful but the idle doesn't change.

 

tried all theses procedures, then finally gave in and too her to the dealer, they told me if the procedure didn't work the ecm could need replacing. long story short it took, and idle is still within specs.

 

Thanks for the "injector trick" i was just thinking of going to the stealer. I am glad i bumped into this thread and saved some dollars.

I got the same issue since i cleaned the TB and moved the butterfly valve during cleaning. The injector trick worked fine in the second try. I just had to keep the engine running for about 30 seconds after i unplugged the three front injectors, and then do the idle relearn procedure. The first time, i shut off the car within 5 seconds of unplugging the injectors and it did not take the relearn.

 

By injectors do you mean you unhooked the spark plug wires?

 

No, you do not want to unhook the ignition coils because it causes fuel to enter the cylinder, not get burned (no spark) and end up in the catalytic converter. With the high heat the fuel will ignite in the cat. conv. and cause damage to the cats.

Unhook the fuel injectors, Try to unhook injectors on the opposite banks. Meaning two in the front bank and one in the rear bank for example.

I had to use long needle nose pliers to get the the injectors in the rear bank.

As mentioned above.

-Start car.

-Disconnect fuel injectors one at a time until idle drops below 800 rpm but does not stall engine.
(I had to disconnect all three injectors for idle to drop. Sometimes two injectors do the trick though).

-Turn off engine.

-Turn ignition on, engine off. Clear the codes.

-Turn ignition off.

-Now perform the relearn procedure.

If it works, your idle will be at or below 750 rpm (depending if auto or manual tranny).

If it did not work you might have to re do everything from the start.

Make sure you meet all the prerequisites on the idle relearning procedures before you start the above. I.E. engine warm, steering straight, radio and lights off, etc.

Took me two tries myself the first time around. Cost me...$0.

Beets going to the dealer any day.

 

Bump.. removing the 3 fuel injectors trick worked for me. Here's how i did it.
1. Drive for 10mins to get your car up to operating temperature.
2. While car is still running, I parked in my driveway and disabled 3 fuel injectors. Letting my car run for about 10 seconds. It brought the RPM down from 1000 rpms to around 800 rpms. I then shut the car off
3. Performed the ECU reset. Did not start the car. And then performed the idle relearn procedure. Starting the car right after. So the RPM went from 800rpm down to 650rpm. I let it run for 20 seconds.
4. Shut car off and replugged the injectors.
At this point I was skeptical on whether it was going to work as i've been dealing with this problem for the last week or so. I kept doing the ecu reset and idle relearn to no avail.
So now with engine still off and the 3 injectors reconnected, I decided to do the ECU reset and Idle relearn one more time just to make sure....SUCCESS!! RPM stayed at 600ish... hope it helps for others...

One more time on the steps:
1. Run to operating temperature
2. Park & disable 3 fuel injectors, let car run for about 10 sec
3. Shut down car
4. Perform ECU Reset (do not start your car)
5. Perform IDLE Re-learn procedure right after (start car and let it run for 20sec)
6. Shut car down and reconnect injectors
7. Start car and your idle should be at spec..600-675 rpm