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      06-22-2015, 05:18 PM   #1
Georgelopz
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Drives: 135i
Join Date: Jun 2015
Location: Los Angeles, CA

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Limp mode! P0326 knock sensor bank 1

Disclaimer: newbie

I just got my 09 135 a few months ago and my car already went into limp mode. It first happened when I down shifted to beat a yellow light. It was still smooth, just slow, so I kept driving to work since I was close. I did my 8 hours and it was gone! I was hoping it was just a hiccup. Two weeks after, again, I down shifted to beat another yellow light and it happened again! However, this time my service engine soon light turned on. It stayed in limp mode for two days (didn't drive it only to check if it goes away). Now, even though it's not in limp mode, it still doesn't feel as fast and the service engine soon light is still on. I'm taking it to the shop tomorrow but I wanted to ask if anyone has had this happened so I start getting an idea of what might be the problem so I don't get screwed at the dealer. Went to pep boys and they pulled the code p0326-knock sensor bank 1.
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      08-10-2015, 11:37 AM   #2
templar12
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Drives: 2008 135iC
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Similar to my current problem! 08 135, automatic. Same sensor code error, replaced the Knock sensor, same code popping up like clockwork but only when on highway, going 65-70 mph, and engine hits on or about 2300 rpm in high gear. Yellow Engine Light/LIMP mode. Drive around town, no highway, limp mode and light disappears. Engine and drive returns to normal. Sp/w a part time tech, says DME needs reflashed/reprogrammed.... what was your shop results....??? (btw-loved your tv show LOL)
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