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Can anyone tell me what that pipe is behind the rear bumper?
Further info: I was also trying to track down two other codes, P1128 and P1130. A smoke test of the intake found a huge hole worn through the accordion section of the brake booster vacuum line. I temporarily wrapped that with electrical tape while a new one is on order.
I ended up leaving a rubber vacuum cap over the end of the pipe behind the bumper, to see what would happen. Without knowing its function, it just seemed odd that any line would be open to atmosphere. So far I've put several hundred miles on the car and none of the three codes has recurred, and no codes are pending. In the past, all three would come back within 20-50 miles of driving. The car is currently running great. I'd still like to understand what the situation is/should be with the line behind the bumper.
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