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OBD scan tool read code is P0100

Tiny
ANONYMOUS
  • MEMBER
  • 1996 BMW 318I
  • 127,000 MILES
Check engine light on and I used OBD scan tool read code is P0100
my car allway checking when start engine or when I stop for the red light engine shut off but when I drive on free way sometime nothing sometime checking how can I do
thank you so much

chan
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Thursday, October 18th, 2012 AT 3:15 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The code P0100 is a fault code for the Mass air flow sensor.
Specifically, the circuit for the Mass air flow sensor.
This could be due to not having correct voltage to the sensor. It can also be a malfunctioning sensor.

I have attached the electrical parameters for this code below.
If there is sufficient voltage to the sensor then it is likely a faulty sensor and will need replacement.

https://www.2carpros.com/articles/how-a-mass-air-flow-sensor-works-maf

Please let me know if you have any questions.
Thank you.
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Monday, January 17th, 2022 AT 9:26 AM

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