Sensor?***

We've started day 4 of my truck being in the shop, won't start, not the battery,

aerozeptallica · 2025-07-11T12:32:35.822Z

I don't have an obd2 scanner so no clue what is wrong. Anyway, some time after 9 last night I get an email from onstar about the #### airbag needs service. My assumption is some goon tried to steal it, it wouldn't start, so they started punching things any it went off. What fun story can you come up with?

because it's always a sensor.

Once, I had to fix my car myself when it baffled "Mr Goodwrench":

Years ago, I had a Pontiac that started shutting off randomly, sometimes at very inopportune times (like going 60 on a highway). Then it wouldn't start until engine had COMPLETELY cooled off. Then, ran perfect for several weeks, until it would do the sudden shutoff again.

Took it to dealer. Obviously couldn't replicate beause it was so random. They drove it and drove it, and said - nothing wrong. I said, no SOMETHING is wrong. Engine dying travelling 60mph in traffic - yeah THAT'S A PROBLEM.

I did a DEEP dive into the internet to see if anybody else was having this same problem with same model car I had. And yeah, I did find others with this issue. They said it was some airflow sensor, like a $25 part causing this. I wish I could have done this myself but I didn't have the tools, it was in a spot I couldn't possibly do myself. So I took it to the dealer again and said - change this air sensor. They said why, this isn't going to do anything? I said - JUST. CHANGE. IT.

They did, it was like $200 total.

Drove car several more years, never had the issue again.

Moral of story, TLDR - Mr Goodwrench ain't got all the answers sometimes. See if you can find others on interwebs with same vehicle that have same issue. I bet you can.

scooter

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and with daggum AI now, makes stuff much clearer and easier

Jul 11, 2025, 10:18 AM

Mr Goodwrench can AI now too I would assume........

Look what AI tells me today when I feed it info from my issue 10 years ago:

AI Overview
Understanding how a bad MAF sensor can cause a Pontiac engine to shut off
A failing or dirty mass air flow (MAF) sensor can certainly cause a Pontiac engine to stall or shut off.

Here's a breakdown of why this happens and what to look out for:
How the MAF sensor works
The MAF sensor measures the amount of air entering the engine and sends that data to the car's computer (PCM or ECU). The computer then uses this information to determine the correct amount of fuel to inject for optimal combustion.

What happens when the MAF sensor fails
When the MAF sensor is faulty or dirty, it can send inaccurate readings to the computer. This leads to an incorrect air-fuel mixture, causing various issues, including:

Rough idling or stalling: An imbalance in the air-fuel ratio, especially at low RPMs, can make the engine unstable and prone to stalling.

Engine shuts off while driving: If the MAF sensor sends completely wrong information or stops sending a signal altogether, the engine might not receive the right amount of fuel and air to continue running, leading to it shutting off.

Reduced power and acceleration: An inaccurate air-fuel mixture can cause the engine to struggle to produce power, leading to poor acceleration and a feeling of dragging or hesitation.
Check engine light: The computer will likely detect a problem with the MAF sensor and trigger the check engine light, storing a diagnostic trouble code (DTC) in its memory (often codes like P0100 through P0103).

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We've started day 4 of my truck being in the shop, won't start, not the battery,

Isn't this how War Games started?***

That movie was on the TV when I hung out with RH before going to see

I'm not a mechanic and I know it's not simple to diagnose #### sometimes but

Oh it hasn't been looked at yet due to all of these other people having issues.

What kinda truck?***

2022 GMC 1500***

love the movie

I don't think I have seen it in decades. Need to rectify that.***

Re: We've started day 4 of my truck being in the shop, won't start, not the battery,

4 days in the shop and still won't start?

As of yesterday they had not looked at it. This truck is still under the 3 year

Re: As of yesterday they had not looked at it. This truck is still under the 3 year

3 days at the Dealership, someone tried to steal it, and they haven't looked at

I have let them know, but via text, that I got that alert. I'm not going

GMC Satisfaction 800 number is who you need to call

99% chance its a sensor

and with daggum AI now, makes stuff much clearer and easier

What I'm searching for doesn't seem to be worth a crap. Probably

I had a BMW once that had a bad gyroscopic sensor.

it's scary and ridiculous how many sensors modern vehicles have

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