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      03-28-2014, 07:21 PM   #1
blistexworks
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SES Code for Thermostat but...

2006 325i (E90) 80K Miles

The car was in an frontal collision and had to replace radiator (aftermarket), thermostat (OEM) along with many other things.

Ever since, SES light comes on and the code says it's Thermostat malfunction. BMW dealer even replaced it again on parts warranty, but the code came back after being driven 50 miles. (thermostat is working fine and checked wiring and found no problems.)

Now they are saying, "itís possible that the aftermarket radiator is causing incorrect temperature threshold readings to the thermostat. Before recommending a BMW radiator, we will reprogram the software to change the temperature tolerances in an attempt to clear the codes."

Is there a chance that all this is due to the car aging (or other misc things triggering SES) and not accident related?
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      03-28-2014, 10:36 PM   #2
Efthreeoh
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My T-stat went out at 129K. The heater element died. I replaced it with the plastic-bodied unit. I'm now at 244K on the original OE radiator. I don't think the aftermarket radiator is your problem.
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      03-28-2014, 10:52 PM   #3
blistexworks
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Ahh.. where is this mystery SES light coming from then??
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      03-29-2014, 08:22 AM   #4
Efthreeoh
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So what you should do is get the actual OBDII code that keep throwing the SES light. Then go to an OBDII website and look up the code. There are several coolant system codes that point to the t-stat, but also have secondary causes that are not related to a t-stat malfunction.



I use www.obd-codes.com
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