Check engine light /P1434

My 06 BMW750 LI had a check engine light on. I took it to AutoZone, had the code P1434. I bought a gas cap from BMW dealer which was a big mistake because the one I bought was generic part, it was not a BMW PART. I could get the same gas cap cheaper from any auto parts store. Anyway I replaced the gas cap when back to the auto part store and have them clear the code. Engine check light gone and now I have a piece of mind.

If you don't mind me asking.. how much was it for them to pull the code? I have that same light on.

I don't think autozone or Pep Boys
Charges . I could be wrong though

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At autozone or advanced auto parts its free as far as i know

Originally Posted by Mr.750

If you don't mind me asking.. how much was it for them to pull the code? I have that same light on.

Its free!!!!!

It free at autozone or advance auto. After you install the new cap . you will need to go back to advance or if you know any mechanic with the scanner to clear the code. you should not have any more check engine light.

I went in there last night and when they got out the scanner it didnt have the 750 in the system so they couldn't pull it..

You need to start the car. I know most auto part make turn on the car. You will not get a code if you just turn the car on. You need to start the car, then the code will come up. Make sure you have that code number P1434 .

Originally Posted by serblot

You need to start the car. I know most auto part make turn on the car. You will not get a code if you just turn the car on. You need to start the car, then the code will come up. Make sure you have that code number P1434 .

What do you mean? I need to have the engine running or not? When we tested it just the battery was on not the engine..

Yes, you most have the engine running. I made the same mistake. I could not figure it out the first time I took it to AutoZone and advance. Then I went back with a friend of mine who also own a BMW. I started the vehicle hooked up the scanner then the code showed up. I was still not convince the cap was the problem. But that was the easier and cheaper step. I bought the cap, replaced it, code gone.

Originally Posted by serblot

Yes, you most have the engine running. I made the same mistake. I could not figure it out the first time I took it to AutoZone and advance. Then I went back with a friend of mine who also own a BMW. I started the vehicle hooked up the scanner then the code showed up. I was still not convince the cap was the problem. But that was the easier and cheaper step. I bought the cap, replaced it, code gone.

Alright thanks for your help! I will definitely be trying this again!

Good luck.

Originally Posted by Mr.750

I went in there last night and when they got out the scanner it didnt have the 750 in the system so they couldn't pull it..

I took my 2006 &50LI to AutoZone today, the tech hook up the scanner, turned on the ignition , butdid not start the car, and was able to get the code P1434, but it was saying "OEM brand: Volkswagon", it did not associate with BMW. And it indicated that "secondary air injectin pump relay circuit short to positive, probable cause: failed air pump relay". Did not mention gas cap. May be the scanner did not work correctly for BMW and gave wrong code?

Please let me know if you can get the problem fix.

Thanks.

The scanner from the auto parts will not say BMW because BMW want you to go to the dealer to get the car check. Therefore it will not show BMW in any body scanner but the code will appear. I had the fuel pump and some other relay code appeared also. But, through research and talk to other people who had the same problem(code) BMW, it was cheaper and easier to change first the gas cap. I tried it and it worked for me. I CANNOT guarantee it will work for you, but I will try that first and if it does not work you can always return the gas cap back. Mind you if you take it to any dealer BMW , they will charge you at LEAST $120 for a diagnostic test.
Good luck

Actually car doesnt have to b started. I have done it numerous of times on my 745. Put in key as if u were going to start car. Press start button but dont push done on brake. Battery lights and other lights will come on and then u can read code.

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Originally Posted by serblot

The scanner from the auto parts will not say BMW because BMW want you to go to the dealer to get the car check. Therefore it will not show BMW in any body scanner but the code will appear. I had the fuel pump and some other relay code appeared also. But, through research and talk to other people who had the same problem(code) BMW, it was cheaper and easier to change first the gas cap. I tried it and it worked for me. I CANNOT guarantee it will work for you, but I will try that first and if it does not work you can always return the gas cap back. Mind you if you take it to any dealer BMW , they will charge you at LEAST $120 for a diagnostic test.
Good luck

So what would I do then? I have to select a vehicle for it to read the code. I tried selecting 5 series but it says no codes found..

Originally Posted by Mr.750

So what would I do then? I have to select a vehicle for it to read the code. I tried selecting 5 series but it says no codes found..

I remember the tech at AutoZone said there was no BMW option for him to select, so he selected "all" or something, then the code P1434 came out, associated with Volkswagen.