P0128 Code After T-stat Water Pump Replacement

bradfr · 04-21-2014, 09:32 AM

I just replaced my thermostat and water pump on my e90 and I am getting a P0128 SES light. What else could be wrong with the system to cause this condition? Is there a temp sensor somewhere that could be bad? With the new pump and t-stat I also flushed the system and used OEM BMW blue coolant.

Judge Dredd · 05-13-2014, 04:09 PM

Did you have the light before the replacement? P0128 is almost exclusively a thermostat fault.

JTRACKER · 08-05-2014, 05:24 PM

I got the exact same thing after spending a grand for the two being replaced. Dealer says come on back in and we'll take more of your money to see what they did wrong.

Never had the code before the two were changed.

Also had an engine wash done and had suspicion that this could cause electrical issues as I also had a non-cooling related code appear and not returned after clearing.

Any additional comments?

Thanks,

JT

04-21-2014, 09:32 AM	#1
bradfr New Member 0 Rep 10 Posts Drives: None Yet Join Date: Mar 2014 Location: Rochester, NY iTrader: (0)	P0128 Code After T-stat Water Pump Replacement I just replaced my thermostat and water pump on my e90 and I am getting a P0128 SES light. What else could be wrong with the system to cause this condition? Is there a temp sensor somewhere that could be bad? With the new pump and t-stat I also flushed the system and used OEM BMW blue coolant.
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05-13-2014, 04:09 PM	#2
Judge Dredd Bayerische Motoren Werke 23 Rep 251 Posts Drives: recklessly Join Date: Oct 2013 Location: Las Vegas iTrader: (0) Garage List 2009 BMW M3 [0.00]	Did you have the light before the replacement? P0128 is almost exclusively a thermostat fault.
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08-05-2014, 05:24 PM	#3
JTRACKER New Member 2 Rep 9 Posts Drives: 2006 E90 330XI Join Date: Nov 2011 Location: Burlington, Canada iTrader: (0)	I got the exact same thing after spending a grand for the two being replaced. Dealer says come on back in and we'll take more of your money to see what they did wrong. Never had the code before the two were changed. Also had an engine wash done and had suspicion that this could cause electrical issues as I also had a non-cooling related code appear and not returned after clearing. Any additional comments? Thanks, JT
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