SES and odd codes

Dazza335iC · 10-28-2019, 10:30 AM

My SES came on the other day. I believe I have low coolant temp (not seeing it get above ~72-74C on cold mornings) but these codes don't match at all with the one I got ~3yrs ago when my previous thermostat totally shit the bed:

--Engine / Motor--
*** 49A5:LIN bus communication ***
*** 4A74:Embassy (ST GSG LIN, 0x18, LIN) ***
*** 4A79:Message (error status GSG LIN, 0x17, LIN) ***
*** 3EED:Power Management quiescent current (Layer PMRUHVERL) ***

(These are from Carly, FYI)

49A5 sounds like possibly a glow plug controller based on searches here
4A74 also sounds like glow plug controller
4A79 also sounds like glow plug controller
3EED sounds like maybe electrical/battery related, so maybe also ties to the GPM if it's cycling on/off due to coolant temp

Also found this great tidbit from Mark M: https://www.e90post.com/forums/showp...5&postcount=13

Any idea if replacing the thermostat will fix the glow plug errors? Or does this usually kill the module requiring replacement?

Nadir Point · 10-28-2019, 02:08 PM

The first thing to do when weird electrical shyt starts happening is charge the battery. I mean REALLY charge it with a proper float charger that will bring it all the way up.

Dazza335iC · 10-30-2019, 12:52 PM

Yep, left it on all night and no changes. Battery is about 3 years old as well so should be in excellent shape.

Dazza335iC · 11-04-2019, 11:55 AM

Replaced the thermostat over the weekend. Unlike the one I replaced ~4yrs ago, this one seemed to be in perfect shape. The tabs were not broken and all seemed as it should be. I also replaced the GPM... fuck they really buried that thing in there didn't they?

Anyway, SES is gone after a reset. However the car still seems slow to warm up. Monitoring via Carly, I only just reached full operating temp of 88C right as I pulled in to the parking lot at work, which is 8.2 miles from my house, roughly 50/50 street/freeway. It was cold this morning, around 37F, but that still seems very slow to fully warm up. Anyone have a similar experience?

robnitro · 11-04-2019, 03:00 PM

That's a normal warmup. If your thermostat was bad you would drop below 80c while on the highway.
I have a 7 mile commute to work and get to 82-84 depending on traffic, I wait a lot at stop lights. It's a new thermostat that was tested in a pot of water, so I know it's good.

On the highway I can maintain 86-88 and that's where bad thermostats show their issue, the airflow through the radiator would drive you below 80.

Nadir Point · 11-05-2019, 12:29 PM

Diesels don't generate as much heat as gassers unless they are working. M57 in a 3-er is like pulling a little red wagon with a train.

10-28-2019, 10:30 AM	#1
Dazza335iC Second Lieutenant 54 Rep 215 Posts Drives: E39 M5, F15 35d Join Date: Nov 2014 Location: Portland, OR iTrader: (0) Garage List 2000 E39 M5 Dinan [0.00] 2017 X5 35d [0.00]	SES and odd codes - GPM and thermostat? My SES came on the other day. I believe I have low coolant temp (not seeing it get above ~72-74C on cold mornings) but these codes don't match at all with the one I got ~3yrs ago when my previous thermostat totally shit the bed: --Engine / Motor-- * 49A5:LIN bus communication * * 4A74:Embassy (ST GSG LIN, 0x18, LIN) * * 4A79:Message (error status GSG LIN, 0x17, LIN) * * 3EED:Power Management quiescent current (Layer PMRUHVERL) * (These are from Carly, FYI) 49A5 sounds like possibly a glow plug controller based on searches here 4A74 also sounds like glow plug controller 4A79 also sounds like glow plug controller 3EED sounds like maybe electrical/battery related, so maybe also ties to the GPM if it's cycling on/off due to coolant temp Also found this great tidbit from Mark M: https://www.e90post.com/forums/showp...5&postcount=13 Any idea if replacing the thermostat will fix the glow plug errors? Or does this usually kill the module requiring replacement?
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10-28-2019, 02:08 PM	#2
Nadir Point Lieutenant 103 Rep 580 Posts Drives: Diesel Join Date: Dec 2015 Location: CO iTrader: (0)	The first thing to do when weird electrical shyt starts happening is charge the battery. I mean REALLY charge it with a proper float charger that will bring it all the way up.
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10-30-2019, 12:52 PM	#3
Dazza335iC Second Lieutenant 54 Rep 215 Posts Drives: E39 M5, F15 35d Join Date: Nov 2014 Location: Portland, OR iTrader: (0) Garage List 2000 E39 M5 Dinan [0.00] 2017 X5 35d [0.00]	Yep, left it on all night and no changes. Battery is about 3 years old as well so should be in excellent shape.
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11-04-2019, 11:55 AM	#4
Dazza335iC Second Lieutenant 54 Rep 215 Posts Drives: E39 M5, F15 35d Join Date: Nov 2014 Location: Portland, OR iTrader: (0) Garage List 2000 E39 M5 Dinan [0.00] 2017 X5 35d [0.00]	Replaced the thermostat over the weekend. Unlike the one I replaced ~4yrs ago, this one seemed to be in perfect shape. The tabs were not broken and all seemed as it should be. I also replaced the GPM... fuck they really buried that thing in there didn't they? Anyway, SES is gone after a reset. However the car still seems slow to warm up. Monitoring via Carly, I only just reached full operating temp of 88C right as I pulled in to the parking lot at work, which is 8.2 miles from my house, roughly 50/50 street/freeway. It was cold this morning, around 37F, but that still seems very slow to fully warm up. Anyone have a similar experience?
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11-04-2019, 03:00 PM	#5
robnitro Captain 160 Rep 803 Posts Drives: x5 35d e70 2011 Join Date: Sep 2016 Location: NYC area iTrader: (0)	That's a normal warmup. If your thermostat was bad you would drop below 80c while on the highway. I have a 7 mile commute to work and get to 82-84 depending on traffic, I wait a lot at stop lights. It's a new thermostat that was tested in a pot of water, so I know it's good. On the highway I can maintain 86-88 and that's where bad thermostats show their issue, the airflow through the radiator would drive you below 80.
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11-05-2019, 12:29 PM	#6
Nadir Point Lieutenant 103 Rep 580 Posts Drives: Diesel Join Date: Dec 2015 Location: CO iTrader: (0)	Diesels don't generate as much heat as gassers unless they are working. M57 in a 3-er is like pulling a little red wagon with a train.
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