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2,806 Posts
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Moderator Edit:
GM advises the following on this sensor:
Important: Due to the sensitivity of the sensor, Do Not use any chemical cleaners including water and Do Not use compressed air to remove contaminates.
Proceed with cleaning the sensor at your own risk. You may consider having a spare on hand before doing so.
The point of this thread is to show that the MAP sensor does get very dirty which may affect engine performance, and it is something to keep an eye on in your maintenance schedule.
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I highly highly highly suggest cleaning your TMAP sensor as a part of your preventative maintenance program. My '18 has 18,300 on it and I was getting codes P0106 for "manifold absolute pressure" followed shortly there after by an unclearable P00C7.
L5P TMAP sensor is both temp and pressure. With the emissions equipment intact , this gets covered in soot....like......COVERED. After losing no driveability, and clearing the MAP code a few times over the last few months, i finally got that P00C7 code. Basically, this is the truck seeing something wrong but cant figure it out amongst the sensors and want you to bring it in for a tech to get dirty. That means $$$ for you. Oh, and the threat of a pending limp mode if you don't address it.
I went and grabbed a $6 bottle of MAP/MAF sensor cleaner and scrubbed it up. Be very careful because its a stupid sensitive part but took about 20min start to finish. Pop off both batteries (10mm), disconnect the sensor from the harness. Pull the sensor (10mm) pull up and out. Will give a little resistance because of the O-ring. I used the straw on the can to knock off the big stuff, then a q-tip to rub it down good. While cleaning, maintain the cage facing down, so as to not push anything back in towards the electronics internally. Not only did it clear my codes, truck feels much stronger and responsive. Plus it gave me bonding time with my almost 2 year old working on his first Chevy
Here are some before and afters
![1086073]()
![1086074]()
![1086075]()
![1086076]()
![1086077]()
Moderator Edit:
GM advises the following on this sensor:
Important: Due to the sensitivity of the sensor, Do Not use any chemical cleaners including water and Do Not use compressed air to remove contaminates.
Proceed with cleaning the sensor at your own risk. You may consider having a spare on hand before doing so.
The point of this thread is to show that the MAP sensor does get very dirty which may affect engine performance, and it is something to keep an eye on in your maintenance schedule.
****
I highly highly highly suggest cleaning your TMAP sensor as a part of your preventative maintenance program. My '18 has 18,300 on it and I was getting codes P0106 for "manifold absolute pressure" followed shortly there after by an unclearable P00C7.
L5P TMAP sensor is both temp and pressure. With the emissions equipment intact , this gets covered in soot....like......COVERED. After losing no driveability, and clearing the MAP code a few times over the last few months, i finally got that P00C7 code. Basically, this is the truck seeing something wrong but cant figure it out amongst the sensors and want you to bring it in for a tech to get dirty. That means $$$ for you. Oh, and the threat of a pending limp mode if you don't address it.
I went and grabbed a $6 bottle of MAP/MAF sensor cleaner and scrubbed it up. Be very careful because its a stupid sensitive part but took about 20min start to finish. Pop off both batteries (10mm), disconnect the sensor from the harness. Pull the sensor (10mm) pull up and out. Will give a little resistance because of the O-ring. I used the straw on the can to knock off the big stuff, then a q-tip to rub it down good. While cleaning, maintain the cage facing down, so as to not push anything back in towards the electronics internally. Not only did it clear my codes, truck feels much stronger and responsive. Plus it gave me bonding time with my almost 2 year old working on his first Chevy
Here are some before and afters
