Random bad engine performance

It could definitely be a bad MAF sensor. It could also be wiring to the sensor. There also might be a lot more to the story.

Since your scan tool says confirmed on the P2227 I would say it has an issue.
It could be affecting the 5v reference signal on the other sensors also. System will limit boost if any intake sensors are acting up to protect the engine. Use only a Genuine GM replacement. Aftermarket sensors are not reliable.

campb292 said:

It could definitely be a bad MAF sensor. It could also be wiring to the sensor. There also might be a lot more to the story.

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repairman54 said:

Since your scan tool says confirmed on the P2227 I would say it has an issue.
It could be affecting the 5v reference signal on the other sensors also. System will limit boost if any intake sensors are acting up to protect the engine. Use only a Genuine GM replacement. Aftermarket sensors are not reliable.

Click to expand...

I drove it for a while after this happened, it seems to be ok, kind of slower but yeah it's weird since I literally drove the car yesterday and it was fine. The codes haven't came back after clearing them, I will replace the MAF sensor if this happens again. I'm assuming the barometric sensor is the same as MAF?

The MAF includes a baro sensor. the MAF technically likes to go by Multifunction Intake Air Sensor in the tech docs. It includes the mass air sensor, intake air humidity, baro, intake air temp.

campb292 said:

The MAF includes a baro sensor. the MAF technically likes to go by Multifunction Intake Air Sensor in the tech docs. It includes the mass air sensor, intake air humidity, baro, intake air temp.

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Ok thank you! Hoping that’s all it is. Wiring looked good from what I could see but any idea about the turbo boost sensor problem? Is that on the same sensor as maf?

The P0236 could be related or might be its own thing. I'd keep on the MAF and see what happens. If that code remains, the boost pressure sensor is a MAP-type sensor located at the cooler side of the charge air cooler pipe. That is the pipe that runs from the low front to the throttle body. You have to take off the bumper to get to it. I've wondered if it might be accessible by removing just the lower front deflector/splash shield but never tried.

Very good chance it is related to the other codes. The P0236 code means ECM detects the boost pressure sensor signal is not within range of a model derived from engine speed, the baro sensor, the MAF sensor, the MAP sensor (upper next to throttle body), the throttle position sensor and the turbocharger boost pressure sensor when the engine is running... It's all intertwined.

I have been driving it all day and so far acceleration seems to have improved itself and back to normal now. No check engine light yet but it was super weird for all those sensor codes to pop up randomly. I had to nearly push the accelerator pedal all the way to the floor to get it moving yesterday