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| 03-26-2014, 03:58 PM | #1 |
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@katib24
11
Rep 116
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-40 degrees on dash
thinking its the jb4... but i shut off the jb4 for a while and it still is coming up -40 degrees. not a big issue just wondering what it is
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E82 135i AW | JB4 |Injen DCI | HPF FMIC | HPF Exhaust | CPE W/tial BOV | AR DPs | RR OCC | Oneeighty Headlights | Broadway Static | Reiger 1M Bumper | APR GT |
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| 03-26-2014, 06:15 PM | #2 |
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Civil Rights Activist
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Rep 949
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It's the external (ambient) temp sensor. The -40 is the default lowest temp. I know it's a common failure in the E46. In most cars it's a little plastic covered probe located somewhere underneath one of the fenders in front of the front wheels. Do a bit of research and you will probably find that this is a common problem and failure and maybe even a DIY. I don't know where it is on the E8x, but someone here might.
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 E88 Crimson Red Vert MSport 6MT - Listing your mods in your signature is lame. BMS DCI/MHD E30 Flash!!/AA Sport FMIC/VRSF CP w Tial BOV/VRSF 3" DPs/550i clutch w SPEC SMFW/Apex EC-7s/Whiteline RSFB/E92 M3 FCAs/Bilstein B12 Pro Kit/VRSF inlets |
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| 03-26-2014, 06:18 PM | #3 |
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Civil Rights Activist
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E88 Crimson Red Vert MSport 6MT - Listing your mods in your signature is lame. BMS DCI/MHD E30 Flash!!/AA Sport FMIC/VRSF CP w Tial BOV/VRSF 3" DPs/550i clutch w SPEC SMFW/Apex EC-7s/Whiteline RSFB/E92 M3 FCAs/Bilstein B12 Pro Kit/VRSF inlets |
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| 03-26-2014, 06:27 PM | #4 | |
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@katib24
11
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Quote:
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E82 135i AW | JB4 |Injen DCI | HPF FMIC | HPF Exhaust | CPE W/tial BOV | AR DPs | RR OCC | Oneeighty Headlights | Broadway Static | Reiger 1M Bumper | APR GT |
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| 03-26-2014, 08:09 PM | #5 |
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Lieutenant Colonel
 
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Drives: Alpine White 128i Cabrio
Join Date: Jun 2013
Location: Toronto, Ontario, Canada
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ECS also sells a kit to replace the ambient temp sensor if you really need it. Mine always reads a tad higher than it is. Not enough to bother me though. Maybe one day I'll replace it or relocate it.
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2008 128i E88 / Alpine White / Boston Leather Sport / 6AT / M3 Paddle Shifters / Bilstein B8 / H&R Springs / Dinan Fixed Camber Plates / BMW 335i Front Brakes / PIAA Xtreme White 4150K Angel Eyes / Rear Fogs Enabled / Cyba Air Scoops / Euro Airbox / BMW Performance Exhaust / Stubby BMW Antenna
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| 03-26-2014, 09:25 PM | #6 |
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The Crowing
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The sensor fits into a slot right under the kidney grills behind the bumper. Have to take the bumper off to get to it. I actually cut the plastic out that it slid into when I installed my intercooler and zip tied it to another spot. Now it reads about 8-9 degrees to hot. One day I'll take the bumper off and relocate it to stick up right behind the grills or maybe in the air duct for the oil cooler. Not sure yet.
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 2009 135i : BMS JB4 G5 ISO,CXRacing FMIC Kit,Injen Cold Air Intake,Evolution Raceworks Charge Pipe,Walboro Inline Fuel Pump, E85 BMS Backend Flash w/ 60% E85,BMS Meth injection (trunkmount),BMS dual meth nozzles,Spec stage 2+ clutch w/ steel SWFW,BMS Catless Downpipes,Berk Tech Race Axleback |
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