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Old 07-26-2017, 04:12 PM   #1
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Join Date: 07-26-2017
Location: Norfolk, VA
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P Codes popping up

Hey guys! I have three codes pop up on my check engine light, and was wondering if somethings connecting the three.
P0327: Knock sensor (showed this code 2 times)
P2187: Bank 1 too lean (showed this code 4 times)
P0106: MAP sensor (showed this one once)

The car is running perfectly. I'm having issues with the battery, and plan to replace it next paycheck. Just wondering if there is something that I'm missing. So you guys know, this car has been up north most of her life. Had an issue with the turbo, and just needed to replace some wiring that was rusted from salt. So I also surmise that a connection somewhere needs to be rewired. Thanks in advance for any tips!
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Old 07-26-2017, 04:41 PM   #2
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Weak battery or high drain will cause many of these faults. I figure the new battery will clear things up.
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Old 07-26-2017, 04:43 PM   #3
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Agree, wait and see what happens with a new battery, it might clear them all up.

Well, technically, replacing the battery will clear the codes. I mean they may not come back.
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Old 07-26-2017, 05:07 PM   #4
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Welcome to the site, weak battery , agreed. I see you have a 2009 SS

The voltage not getting to the sensor in the P0327


Same for the P0106, possibly caused by low voltage or loose ground


But the P2187 may be because of other issues, have a read here


So, check the harness at the MAP sensor, check the ground wires, replace the battery as you intended, then watch for the CEL to possibly light up again in a while
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Old 07-28-2017, 07:10 AM   #5
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Thank you so much guys! I'll replace the battery first thing Tuesday, and give you guys an update!
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