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My Cadillac vibrates when in idle or stopped position

Tiny
MZTEEPOWELL
  • MEMBER
  • 2004 CADILLAC SRX
  • 178,000 MILES
My car vibrates when in idle or stopped. I notice that this happens after the car has been running for a while.

The check engine light came on so I took it to Auto Zone to read the codes. They printed me a report with no error codes. I asked them to repeat it and still nothing.

There are few messages that displays across my radio when I start up my car.
1. Service stability system
2. Service brake assist - ABS light is on. Is this a cause or effect of the stability system failure?
3. Service tire monitor -when I got my car, it had the wrong sized tires. I have since replaced the two rear tires with P255 60R17 but the two front tires are still incorrect. They are P245 60R17 and should be P235 65R17. Is it possible the previous owner disconnected the sensor to install the wrong tires?

Your help and advice is much appreciated!
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Friday, February 19th, 2016 AT 6:08 PM

9 Replies

Tiny
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  • 6 POSTS
Also when I feel my car it does not inmediately crank even when it still has gas in it. And for a v6 engine I think the gas consumption is too high.
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Saturday, February 20th, 2016 AT 9:41 AM
Tiny
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  • 6 POSTS
I am noticing that the vibration gets worse when I turn my heat or air conditioning. It's more subtle than it sitting in idle without the air condition running. Sometimes it vibrates so hard that I have to hold the steering wheel to prevent it from shaking and sounding so loudly.
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Saturday, February 20th, 2016 AT 9:44 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
It could be engine mounts, check this guide and get back to me with what you find

https://www.2carpros.com/articles/vibration-noise
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Tuesday, February 23rd, 2016 AT 3:59 PM
Tiny
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  • 6 POSTS
Will do. Do you think that's the issue with the fuel as well? When I fuel up for some reason my car will not crank. Could it be the O2 sensor?
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Tuesday, February 23rd, 2016 AT 4:05 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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It sounds like a weak fuel pump, have you had it replaced recently?
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Wednesday, February 24th, 2016 AT 7:34 AM
Tiny
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  • 6 POSTS
As it turns out the mass air flow sensor needed to be replaced.
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Saturday, February 27th, 2016 AT 5:32 PM
Tiny
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  • MEMBER
  • 6 POSTS
As it turns out the mass air flow sensor needed to be replaced. It was causing the issue with the fuel tank pressure sensor performance.
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Saturday, February 27th, 2016 AT 5:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
O nice, good work this thread will help others with the same problem, the power of the web, please come back and ask us any other questions you have and tell a friend :-)
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Monday, February 29th, 2016 AT 9:57 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Thanks again for getting back to us
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Monday, February 29th, 2016 AT 10:01 AM

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