check engine light on! - BMW 3-Series (E90 E92) Forum

Vadik17 · 12-08-2012, 10:11 PM

I read the code that pops up. Its 2185. Engine coolant temperature sensor 2. I have no clue what to do, I mean obviously it needs to be replaced but i dont know where it is. If anyone knows where it's located at, please let me know. It would be greatly appreciated. It is an 06 330i A/T

DUI Elite · 12-08-2012, 10:13 PM

I had the same thing. Coolant sensor stuck high (high temp)

I wouldn't jump to the conclusion / decision to replace it. First visually check your coolant level making sure its between min an max. Then just have it reset at a local autozone or something if you can. See if it comes back. If it does, the sensor could just be bad (not too uncommon).

Barny · 12-09-2012, 04:42 AM

How do you read the codes? No numbers come up when my check engine light comes on.

If I go above 3000 RPM, it goes straight into limp mode. The earliest BMW appointment I could get isn't until next year.

Efthreeoh · 12-09-2012, 07:52 AM

The only place I know there is a coolant temp sensor is on the lower radiator hose and it is P/N 13621433077. The hose is on the right side of the engine compartment (the passenger side) on the hose that comes out of the bottom of the radiator into the T-stat.

bumere90 · 12-09-2012, 04:49 PM

facing the engine it is on your left (passenger side) lower radiator hose

07lilredwagon · 12-09-2012, 05:50 PM

it does not look very hard to replace the sensor....just unclip the lead (***after the engine has cooled, of course), unscrew the sensor and install a new one. They say use a new copper gasket too...sometimes just disconnecting the clip, checking that the contacts are clean and reinstalling the clip can get a sensor working again, but its a long shot.

guys, will any coolant leak out when the sensor is unscrewed?

just wondering.

JP

Efthreeoh · 12-09-2012, 06:05 PM

Quote:

Originally Posted by 07lilredwagon

it does not look very hard to replace the sensor....just unclip the lead (***after the engine has cooled, of course), unscrew the sensor and install a new one. They say use a new copper gasket too...sometimes just disconnecting the clip, checking that the contacts are clean and reinstalling the clip can get a sensor working again, but its a long shot.

guys, will any coolant leak out when the sensor is unscrewed?

just wondering.

JP

Yes. It is near the bottom of the cooling system. You'll need to drain the system first, or you'll make a mess.

Vadik17 · 12-12-2012, 11:00 PM

so im feeling pretty stupid. Turns out after i installed the new radiator, I forgot to connect the sensor -_- anyways, problem is now fixed. Thanks for all the input though. It's greatly appreciated.

12-08-2012, 10:11 PM	#1
Vadik17 New Member Drives: BMW 330i Join Date: Aug 2012 Location: Sacramento, CA Posts: 18 iTrader: (0)	check engine light on! I read the code that pops up. Its 2185. Engine coolant temperature sensor 2. I have no clue what to do, I mean obviously it needs to be replaced but i dont know where it is. If anyone knows where it's located at, please let me know. It would be greatly appreciated. It is an 06 330i A/T
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12-08-2012, 10:13 PM	#2
DUI Elite ///M at Heart Drives: 2006 SGM E90 Join Date: Jan 2011 Location: Chicago, IL Posts: 1,328 iTrader: (2)	I had the same thing. Coolant sensor stuck high (high temp) I wouldn't jump to the conclusion / decision to replace it. First visually check your coolant level making sure its between min an max. Then just have it reset at a local autozone or something if you can. See if it comes back. If it does, the sensor could just be bad (not too uncommon). Last edited by DUI Elite; 12-09-2012 at 05:54 PM.

12-09-2012, 04:42 AM	#3
Barny Private First Class Drives: 335is Join Date: Mar 2011 Location: K-town, Germany currently Posts: 146 iTrader: (0)	How do you read the codes? No numbers come up when my check engine light comes on. If I go above 3000 RPM, it goes straight into limp mode. The earliest BMW appointment I could get isn't until next year. __________________ *2011 Le Mans Blue 335is*

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12-09-2012, 07:52 AM	#4
Efthreeoh Captain Drives: E90 Join Date: May 2012 Location: MARLAND Posts: 976 iTrader: (0)	The only place I know there is a coolant temp sensor is on the lower radiator hose and it is P/N 13621433077. The hose is on the right side of the engine compartment (the passenger side) on the hose that comes out of the bottom of the radiator into the T-stat.

12-09-2012, 04:49 PM	#5
bumere90 Grozniy Drives: E90 Join Date: Jan 2009 Location: FL Posts: 2,351 iTrader: (11)	facing the engine it is on your left (passenger side) lower radiator hose

12-09-2012, 05:50 PM	#6
07lilredwagon Lieutenant Drives: 07 328 wagon Join Date: Dec 2012 Location: New York Posts: 428 iTrader: (0)	it does not look very hard to replace the sensor....just unclip the lead (***after the engine has cooled, of course), unscrew the sensor and install a new one. They say use a new copper gasket too...sometimes just disconnecting the clip, checking that the contacts are clean and reinstalling the clip can get a sensor working again, but its a long shot. guys, will any coolant leak out when the sensor is unscrewed? just wondering. JP

12-12-2012, 11:00 PM	#8
Vadik17 New Member Drives: BMW 330i Join Date: Aug 2012 Location: Sacramento, CA Posts: 18 iTrader: (0)	so im feeling pretty stupid. Turns out after i installed the new radiator, I forgot to connect the sensor -_- anyways, problem is now fixed. Thanks for all the input though. It's greatly appreciated.