I have a 2002 Buick Century and never had any trouble with it. Rarely drive it. All of a sudden it cut off on me on the interstate. Been driving it...

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Customer

I have a 2002 Buick Century and never had any trouble with it. Rarely drive it. All of a sudden it cut off on me on the interstate. Been driving it all day. It starts up fine but then after about a minute it will begin to choke, sputter, and rough idle then cuts off. Towed to mechanic and he said he got a code P0300 and it had a bad misfire and needed 6 spark plugs, 6 spark plug wires, and 3 coil packs. Replaced those, doing same thing. Then on other bad advice told to clean idle air control valve, replace MAP sensor, replace fuel filter, clean throttle body, and replace MAF sensor. None of these worked. Finally towed to dealership for diagnostic on code P1635 and after testing every wire and 5 volt part on vehicle, they could not determine the issue. Said they had to call the manufacturer for help, but are still waiting on callback, as they are on strike. They said that when it's connected to their machine, it runs fine, but once disconnected it starts the sputtering and dies again. They then determined it was the O2 sensor that needed replacing and that would get the vehicle running again but they couldn't guarantee the check engine light would turn off. I explained the tags will require renewing in Dec. and would not pass emissions with light on. Replaced the sensor today and it is still doing the same thing. Will start up then die after a few minutes. At this point we have dumped a few hundred dollars into this car but don't want to trash it. The day this happened, I did fill up the tank with gas, but had been driving the car all day with no issues. Also, the odometer is not working in car. Told the cluster panel needed replacing, but hasn't been done yet. Called another mechanic friend and was told that it could be the PCM. I can't afford to pay for more guessing.

Last updated
Ramy De Jesus
Buick Mechanic

Hello and welcome to ExpertHelp.com! My name is Ramy De Jesus and I'm going to do everything in my power to answer your question to your full satisfaction!

Before we get started, I want to remind you ExpertHelp.com is an independent professional support company. We are not associated with Buick nor are we paid to provide support on their behalf. However, we have helped hundreds of customers with similar questions and believe we can help you too. OK, let’s get started! :)

I’m available to chat now. Please let me know that you are ready by posting a response. I’ll leave my chat session open for the next 15 minutes or so and wait for your reply. If I don’t catch you this time, please respond with a few times (including your timezone) that work best for you and we can connect then.

Last updated
Customer

Hi! Thank you for responding! I am in Eastern timezone and know nothing about cars. However, I am available to chat around 8 or 9 a.m. in the morning, if that's ok with you? 

Posted
Ramy De Jesus
Buick Mechanic

Hi Emily! Thank you for choosing ExpertHelp.com. Your mechanic friend is 80 percent right if everything has been replace and still having the same issue the PCM is mostly the problem. But before we proceed to that lets try some troubleshooting steps. 

  1. Disconnect the negative connector on your battery and wait for 5 minutes to connect it back again.
  2. Then put the ignition to on position but do not start the engine the put it to off 5 times and then start it after that.
  3. Then let the car running for 15 minutes and see if you will still having the same issue.

Please let me know if this helps. I will leave this page open and will wait for your updates. When your ready, please type your responses on this page and then click on the Blue Send Response button to post your response. I will be standing by for your response.

Posted
Customer

Ok. The car is at my boss's house. He has been working on it for me.  I will send this info to him to try.  It is almost 1 a.m. here so I am not sure when he will be able to try it and tell me the results.  Are you always online or only at certain times of the day? 

 

Posted
Ramy De Jesus
Buick Mechanic

No worries I am always online just keep me posted. :)

Posted
Customer

Will do! Thanks so much!!  

Posted
Ramy De Jesus
Buick Mechanic

No worries! :)

Posted
Ramy De Jesus
Buick Mechanic

Hi Emily,

I just want to follow up with regards your issue. Please advise me if the issue is already resolve or you still need further assistance. I will leave this page open and will wait for your response.

 

Regards,

Ramy De Jesus

Posted
Customer

Hi Ramy!

Thank you so much for your patience! I finally was able to get my boss to do what you suggested this morning.  He was out of town yesterday.  He said that it didn't work.  Those steps you gave me, was that to reset the PCM?  

Posted
Ramy De Jesus
Buick Mechanic

Thank you for your response. Yes that was to reset the system of your vehicle. If that will not work then there is a big possibility that there is a problem with your pcm it might be faulty. Have it check and advise me what will be the result.

Posted
Customer

Ok. Thank you for your assistance.  

Posted
Customer

Besides the PCM, is there anything else that code P1635 might indicate? Something beside what I've told you we've already done? 

Posted
Ramy De Jesus
Buick Mechanic

This error is for the MAF sensor. Since you already repleace it they can clear this  code. The only thing that is needs to be check is the PCM since almost all the things needs to be replace already been replace. Happy to help. Is there anything else I can assist you with?

Posted
Ramy De Jesus
Buick Mechanic

Is there anything I can assist you with Emily?

Posted
Customer

No. I'm good. Thanks and enjoy your evening.  

Posted
Ramy De Jesus
Buick Mechanic

Please do not forget to click on the Green Accept Answer button for me to receive a credit for assisting you. Thank you for allowing us to help you.

Posted
Ramy De Jesus
Buick Mechanic

Dear Emily, It was a pleasure helping you with your Buick issue today. Here is a summary of the resolution.

Issue identified : Engine cutting off
Solution Implemented : Live chat. Provide on the chat possible solution to the issue still no go. Advise customer to have the PCM check since all the parts needs to be replace is already replace and still having the same issue. Customer agree. Customer accept the answer. Chat ended.
If issue resurfaces : Advised to contact us at s**t@experthelp.com or call us on our support number ***-***-**** )

Posted
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