Randomly shuts off while driving, codes p0401 and p0101

2003 PONTIAC GRAND PRIX
165,000 MILES • 3.1L • 6 CYL • 2WD • AUTOMATIC
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TONDA BOWMAN
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  • 11 POSTS
My car will just shut off while driving down the road at any given time. hot ,cold, short-term, long-term. I've changed out my throttle position sensor, my mass air flow sensor, my crankshaft position sensor. I have changed the air filter, changed out fluids and nothing has helped. I put a code reader on it and it pops with p0401 and p0101. Which both have to do with circulation of air. Any ideas anything would help.
May 4, 2021 at 10:52 AM
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ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
Good evening,

I attached the possibilities for the codes. The mass airflow is suspect here. Check the connector for both 12 volt and 5-volt signals. I attached the diagram with the color wires you need to test.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

The EGR code will not cause it to shut off but most of the time it is the sensor that is bad.

Roy
May 4, 2021 at 11:10 AM
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TONDA BOWMAN
  • MEMBER
  • 11 POSTS
I already changed the mass air flow sensor.
May 5, 2021 at 8:18 AM
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ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
I read that. I asked you to check the voltage at the connector. It could be an electrical issue, not a component issue.

Roy
May 5, 2021 at 8:57 AM
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