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BMW 3-Series (E90 E92) Forum
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Code 2937 won't go away
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07-16-2021, 12:27 PM | #1 |
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Code 2937 won't go away
Hi All,
Just picked up a used 2011 335 cheap but cant get this code to go away. I have replaced the temp sensor with known good ones and installed a new water pump and thermostat. I was thinking it could be a short in the harness since a bad radiator hose was leaking all over the front of the engine but I ran a continuity test with my meter from the sensor plug to the DME plug and it all checks out. 0x2937 10551 Coolant temperature sensor, electrical: Short to B+ or open circuit The diagnostic function monitors the coolant temperature sensor's wires. P0118 Engine Coolant Temperature Sensor 1 Circuit High The fan runs full blast and screen says engine overheating since it is being fooled into thinking it is. I clear the code, fan slows, but it just comes back. The only other thing I can think of is a bad DME but it doesn't seem likely(?). I have a spare I could attempt to clone but would rather not. I appreciate any ideas to try.
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2011 e90 335 xDrive Space Grey, Auto
Cobb cat-back, Cobb discharge pipe, Cobb downpipe, JB4'd |
07-17-2021, 08:59 AM | #2 | |
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https://static.nhtsa.gov/odi/tsbs/20...45369-9999.pdf |
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07-17-2021, 10:36 AM | #3 | |
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2937 Coolant temperature sensor, electrical: short circuit to positive 2936 Coolant temperature sensor, electrical: short circuit to earth
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2011 e90 335 xDrive Space Grey, Auto
Cobb cat-back, Cobb discharge pipe, Cobb downpipe, JB4'd |
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07-18-2021, 12:34 AM | #4 |
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It's a hornets nest of wires by the DME, so it could be many. Have you looked in TIS about the troubleshooting procedure?
On a side note, although not the same problem, this had a similar result. May want to just take a gander at the battery compartment to rule it out. [SOLVED] Water Pump Issue. Overheating 2E84 and 2E7C Codes https://www.e90post.com/forums/showthread.php?t=1521141 |
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07-18-2021, 06:49 PM | #5 | |
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I took the wiring harness off the front of the engine to day to look into the black junction box but the wires looked perfect. I'll do more troubleshooting this week.
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2011 e90 335 xDrive Space Grey, Auto
Cobb cat-back, Cobb discharge pipe, Cobb downpipe, JB4'd |
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07-18-2021, 11:39 PM | #6 | ||
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07-21-2021, 12:20 PM | #7 | |
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I may just drive it a bit and see what happens then take it to an Indy and have them hook it up and diagnose. Thanks for all your input, I appreciate it. I will update the thread if I figure anything out.
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2011 e90 335 xDrive Space Grey, Auto
Cobb cat-back, Cobb discharge pipe, Cobb downpipe, JB4'd Last edited by 89Rustang; 07-23-2021 at 11:25 AM.. |
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