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throttle body replaced, but SES on again - p0507

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Old 09-09-2010, 03:23 PM
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throttle body replaced, but SES on again - p0507

this is really pissing me off. so i've been through the throttle body relearn about 10 times already and each time, the same thing seems to happen - it idles normal around 650 - 750 rpm after the relearn procedure, but then within a day, it jumps back up to 850-900 rpm so the SES is legit. i just have no f'n idea. is the idle control a separate piece? i thought it was part of the throttle body assembly.

a little history - the light came on about 3 months ago - so i had the throttle body cleaned. i cleared the SES and it came back 250 miles later. so then i replaced the throttle body completely - still seeing the same problem even after it's been cleared.

i went to autozone to get my SES diagnosed and it comes back with p0507

"idle speed control system RPM higher than expected"

probably cause (given to me by autozone):

-large vacuum leak
-faulty throttle control actuator
-throttle body damage

i've replaced the the throttle body so it can't be the last 2 - so i'm left with 'large vacuum leak'. does someone know how to diagnose this issue? i have a 2003 sedan.
Old 09-09-2010, 08:02 PM
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What was the error code read when the SES first came on and what did you notice 3 months ago? How did you know it's the throttle body? There are cases that replacing tb didn't fix the problem. Do an extensive search using keywords "P0507" "throttle body cleaning" "high idle" "idle reset" if you haven't done so. This is a common issue on 2002 - 2005 Nissan and Infiniti cars, check Infiniti TSB ITB05-042.

If there's a large vacuum leak you should get a code, and the idle would be rough. Make sure you don't have any vacuum leak and time the relearn procedure precisely. If all options are exhausted then you might have to send it in to get it fixed.
Old 09-09-2010, 10:20 PM
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go through the key reset and it should fix it..

Old 09-10-2010, 04:08 PM
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^+1
Old 09-10-2010, 05:50 PM
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Quote:
Originally Posted by StormTroopa View Post
go through the key reset and it should fix it..

when i first got an SES the code was p1121 - electronic throttle control actuator. mechanic said throttle body - made sense...it was really gunky.

I'm not sure what you mean by "key reset" but i've reset the ECU and still a no go following the manual procedure and the SES goes off and comes back. I read somewhere to unhook the negative terminal on the battery overnight and that is the same thing. i might try that tonight.

apparently this is a 2002 -2005 nissan thing and it's happened to a lot of people - p0507 after replacing/cleaning throttle body. same issues for them too. a consult II might be the way to go in the end. moral of the story is - if you so much and look at your throttle body the wrong way, you might be f'd.
Old 09-10-2010, 09:01 PM
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Read this: . Some people got it working, so just give it a try.

From my search, it's crucial to disconnect the battery before you clean/replace throttle body. If you move the butterfly without disconnecting the battery you could have a hard time get it back to normal.
Old 09-10-2010, 10:17 PM
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did he move the throttle plate when he cleaned it? if so you need to replace the throttle body. you are not suppose to move the plate bc of the splines/teeth on the actuators on the inside
Old 09-11-2010, 05:07 AM
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Same problem has happened to me too but luckily I took my car in for an oil change last week at my local mechanic shop. I told him the problem and I said no matter how many time I reset it would still came back (I thought my TB is done). He said he will take a look and pulled out his OBDII reader device and went for a test drive, after he came back and the car was idling like it was before I cleaned the TB, no more SES light up until now and it seemed to be back to normal again. Honestly, I dont know what the hell he did with his little obdII "device" but it worked. So technically you can fix this problem without replacing a new throttle body.

Try calling and ask around local mechanic shops, they have their own little tricks that nobody knows lol
Old 09-13-2010, 11:06 AM
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Quote:
Originally Posted by StormTroopa View Post
did he move the throttle plate when he cleaned it? if so you need to replace the throttle body. you are not suppose to move the plate bc of the splines/teeth on the actuators on the inside
that was my first thought - which is why i was so quick to replace the throttle body when this happened the very first time. but when i had it replaced i made sure he didn't touch the valve at all.

ray - yeah...when it was replaced, i made sure he disconnected the battery before touching the TB. i'm definitely going to try out that info from the link you posted. definitely some differences from what he said worked, and what is stated on the relearn procedures.
Old 09-13-2010, 07:10 PM
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i noticed when i had mine replaced, infiniti doesn't give you a brand new one, they send refurbished ones. refurbished suck and can always go bad
Old 09-13-2010, 11:34 PM
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Cool throttle body relearn

A couple steps to add to the relearning procedure. I attempted the reset 10+ times and it would work until I turned the car off. Here is some help:

These are the three items I believe (after 10+ hours of research on many nissan/infiniti forums) are neglected/ or not-emphasized enough:

1. Reset the ecm before the idle relearn procedure (may or may not be necessary, but it is suggested by many people)

2. In the final step of 'idle relearn':

The manual says release the pedal within three seconds of the light on. You must release the pedal AND start the engine within the three seconds. So you have three seconds to let go, and then start the car. THis is not explicitly stated.

3. After performing the reset and idle is OK, you must restart the car within 10 seconds of turning it off. So, if the idle goes back to normal after the reset, make sure to turn the car off and start it back up within a few seconds.

This is a summary of the info I was able to collect and fixed my idle. This seems to be a big problem, especially since the FSM is not COMPLETELY explicit or complete. I can cite some references if needed.
Old 09-14-2010, 12:53 AM
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altima-03-high-idle-after-routine-throttle-body-cleanup

Quote:
Originally Posted by ray1370 View Post
Read this: . Some people got it working, so just give it a try.

From my search, it's crucial to disconnect the battery before you clean/replace throttle body. If you move the butterfly without disconnecting the battery you could have a hard time get it back to normal.
Hey Ray

I had posted the original issue on the Altima forum about two years ago and just got this linkback to you guys. I would like to say that I know how frustrating this issue is, so I'll try to shed some light on the subject as these cars are blood related.

DO NOT change the throttle body if you have this problem. You will only be wasting your money. You should be able to have the system re-learn without replacing anything.

I am sure the process of re-learn for your G35's must be a bit different from my Altima, the computer for the G35's may react the same and get the RPM's low after the process is completed but will just come back after you start your engine, same as the 3.5 Altima. But the process I tried and tested only works well with the 2.5 or four cylinder models.

For the time being and as Ray stated, you must disconnect the battery before performing any mechanical work around the throttle or you will loose the RPM setting once again. The throttle has a linear resistance disc inside that reacts to the blade position sending the proper signal to the computer. There's really no electronics inside, so don't believe what they say about easily damaging the unit.

Hope this helps (a bit) and sorry for jumping lanes....
Old 09-14-2010, 01:23 AM
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^

^+1

If you get to the point of having a good idle (650 +-50), just make sure to turn the car back on after you shut it off WITHIN 10 seconds. Otherwise, you'll be happy to have a good idle, only to turn the car off and be disappointed when you turn it back on. (mine kept going to back to 950).

I did this twice just to make sure and it was good after that. Learned this on the Altima forum.

If you compare several of the FSM's, for these Nissan's, the procedures are almost all identical. (including the G35). PM if you would like further details. I struggled with this for several days.
Old 09-14-2010, 03:47 AM
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Quote:
Originally Posted by AltimaPR View Post
Hey Ray

I had posted the original issue on the Altima forum about two years ago and just got this linkback to you guys. I would like to say that I know how frustrating this issue is, so I'll try to shed some light on the subject as these cars are blood related.

DO NOT change the throttle body if you have this problem. You will only be wasting your money. You should be able to have the system re-learn without replacing anything.

I am sure the process of re-learn for your G35's must be a bit different from my Altima, the computer for the G35's may react the same and get the RPM's low after the process is completed but will just come back after you start your engine, same as the 3.5 Altima. But the process I tried and tested only works well with the 2.5 or four cylinder models.

For the time being and as Ray stated, you must disconnect the battery before performing any mechanical work around the throttle or you will loose the RPM setting once again. The throttle has a linear resistance disc inside that reacts to the blade position sending the proper signal to the computer. There's really no electronics inside, so don't believe what they say about easily damaging the unit.

Hope this helps (a bit) and sorry for jumping lanes....
AltimaPR, I first found your updated procedure from FX35 drivers, which got their idle fixed, so I hope this will help the OP. The re-learn procedure is the same according to the FSM. This didn't work out in my case, though, I believe others might benefit from following your instruction. Great to have you chime in, hope you don't mind the linkback.
Old 09-14-2010, 11:05 AM
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Quote:
Originally Posted by ray1370 View Post
AltimaPR, I first found your updated procedure from FX35 drivers, which got their idle fixed, so I hope this will help the OP. The re-learn procedure is the same according to the FSM. This didn't work out in my case, though, I believe others might benefit from following your instruction. Great to have you chime in, hope you don't mind the linkback.
Not at all, I know the feeling and wanted to help.

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0507, 2003, altima, body, fx35, g35, idle, itb05042, model, procedure, relearn, replace, replacing, throttle, tsb
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