Code 004987 / P0546 exhaust gas recirculation temperature sensor

bimmerjunkie · 05-25-2020, 03:03 PM

This code just popped up in my 35D and I found this on tunemyeuro:

"Fault Code: 004987 - Exhaust gas temperature sensor upstream of the catalyst, signal - Solution: Replace EGT #1 or it may be plugged into the wrong socket"

Which sensor is EGT#1? I have only this code in my DDE and it's causing the engine light to be on. I looked on RealOEM and there's a ton of different exhaust temperature sensors... How do I know which one to replace? Thanks

Yozh · 05-28-2020, 12:03 AM

First check it’s plugged right. Is your car stock?

bimmerjunkie · 05-28-2020, 12:33 PM

car is stock - the only sensor I've had disconnected recently is the one at the top of the EGR cooler while doing the thermostat. It looks like it's fully seated on there... maybe I'll try contact cleaner on it. The code seems to be pointing more to number 12 in the diagram in the attached picture though, right?

Yozh · 05-28-2020, 11:29 PM

That’s another thing to check is for any recent work that has been done on the vehicle. Check the sensor you had disconnected first. They could be interconnected code wise.

Drews2k · 06-20-2020, 05:13 AM

Quote:

Originally Posted by bimmerjunkie

car is stock - the only sensor I've had disconnected recently is the one at the top of the EGR cooler while doing the thermostat. It looks like it's fully seated on there... maybe I'll try contact cleaner on it. The code seems to be pointing more to number 12 in the diagram in the attached picture though, right?

Before replacing anything why not check with the diagnostic tool if it is reading temperature correctly ?

Mtntom3005 · 07-25-2020, 10:05 AM

Quote:

Originally Posted by bimmerjunkie

This code just popped up in my 35D and I found this on tunemyeuro:

"Fault Code: 004987 - Exhaust gas temperature sensor upstream of the catalyst, signal - Solution: Replace EGT #1 or it may be plugged into the wrong socket"

Which sensor is EGT#1? I have only this code in my DDE and it's causing the engine light to be on. I looked on RealOEM and there's a ton of different exhaust temperature sensors... How do I know which one to replace? Thanks

Did you ever locate the location of the sensor? I’m having this same issue.

05-25-2020, 03:03 PM	#1
bimmerjunkie New Member 2 Rep 11 Posts Drives: X5D Join Date: May 2020 Location: USA iTrader: (0)	Code 004987 / P0546 exhaust gas recirculation temperature sensor This code just popped up in my 35D and I found this on tunemyeuro: "Fault Code: 004987 - Exhaust gas temperature sensor upstream of the catalyst, signal - Solution: Replace EGT #1 or it may be plugged into the wrong socket" Which sensor is EGT#1? I have only this code in my DDE and it's causing the engine light to be on. I looked on RealOEM and there's a ton of different exhaust temperature sensors... How do I know which one to replace? Thanks
	Appreciate 0 Tweet Quote

05-28-2020, 12:03 AM	#2
Yozh Colonel 870 Rep 2,615 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	First check it’s plugged right. Is your car stock?
	Appreciate 0 Quote

05-28-2020, 12:33 PM	#3
bimmerjunkie New Member 2 Rep 11 Posts Drives: X5D Join Date: May 2020 Location: USA iTrader: (0)	car is stock - the only sensor I've had disconnected recently is the one at the top of the EGR cooler while doing the thermostat. It looks like it's fully seated on there... maybe I'll try contact cleaner on it. The code seems to be pointing more to number 12 in the diagram in the attached picture though, right? Attached Images
	Appreciate 0 Quote

05-28-2020, 11:29 PM	#4
Yozh Colonel 870 Rep 2,615 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	That’s another thing to check is for any recent work that has been done on the vehicle. Check the sensor you had disconnected first. They could be interconnected code wise.
	Appreciate 0 Quote