My vehicle turns off whenever I come to a complete stop?

2008 SATURN AURA
118,000 MILES • AUTOMATIC
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COCOBRE22
  • MEMBER
  • 1 POST
This has been baffling me for several weeks. My car has been having this weird issue where at times it will turn off whenever I'm seating in traffic, in the parking lot or at a red light. The first sign that it's going to turn off is that the vehicle start to run rough and shaky. The RPM, speedometer, and the gas needle starts to go crazy. Then, the vehicle will turn off. It usually will "self heal" after I have driven it for roughly 20 mins but within the past few days it's seems to be getting worse. I was linking these issues to the temperature as it was only doing this in the mornings, by the time that I had clocked out for the day it would be fine on my way home. However, it's starting to do this in the evenings as well.

What makes this frustrating is that the check engine light is not present. The first time this issue occurred the light was on but briefly. I have taken it to several mechanics and they are unable to find any issue when they run a diagnostic.

Any assistance would be greatly appreciate it and feel free to ask any questions.
Oct 20, 2026 at 2:48 PM
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WEAVERASH84
  • ✓Experienced Mechanic
  • 2 POSTS
The gauges going crazy together is the biggest clue. That makes me suspect an intermittent electrical supply, ground, or communication problem before blaming a dirty throttle body or fuel pump. It’s a starting point, not a confirmed diagnosis.
A loose or corroded battery connection, bad engine/body ground, or unstable alternator output could affect several systems at once. Poor grounds can cause voltage drops, electronic malfunctions, and misleading diagnoses.
Here’s what I’d have the shop do:
Keep it overnight and test it cold, when the problem is most likely to happen.
Check battery terminals and engine/body grounds with loaded voltage-drop tests. A visual inspection alone isn’t enough.
Record charging voltage during the rough idle, and check alternator ripple. The key is whether electrical instability starts before the engine RPM falls or follows it.
Scan every control module, including stored/pending faults and communication codes—not just engine codes. Check ignition-switch or main-relay power feeds if the supply drops out.
No check-engine light doesn’t rule out a fault. An intermittent problem can disappear before the appointment, and a code scan alone doesn’t establish that everything is working.
Since it’s worsening and stalling in traffic, avoid driving it until it’s checked; towing is the safer option. Safer is always BETTER
Oct 21, 2026 at 9:40 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,561 POSTS
WEAVERASH84 is correct, here is a guide to help you step by step.

https://2carpros.com/articles/stall-at-idle/

Please let us know what you find.
Oct 23, 2026 at 7:19 AM
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