5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I have a question. My SES light came on. So I ran diagnostics it and it came up as Code-69. I replaced the sensor, I used OEM, and reset the SES.
Couple of days later SES came on again. Same Code-69. So I did another reset. Couple of days later same thing.
I ran OBC test-7 and I think my KTEMP is OK. It in mid 70's C and slightly higher when standing for 5 to 10 min. I think it reached up to 82 C. Out side temp was about 45 F. (It is winter in CO..............LOL).
The temp gauge in right in the middle (12 O'clock) when car is fully warm.
Could it be that T-Stat got stock in open position and car is running too cold?
I have tried to clear codes using BavAuto SR-300 (Love that little tool). But code keeps coming back.
I never reach 90 C - KTEMP, but it is cold here. I average about 75 to 78 C while driving and a little higher when standing.
My car has a little over 105K mile, so I think it might be time to change T-Stat and change the cooling. Don't want to over-heat during the summer.
I am going to take it to the shop, because I think changing a T-stat is a little above my ability. (Its not like in Toyota's...............LOL).
Really? I thought it was pretty complicated on German cars.
I'll need to do more research, maybe I'll find step by step DIY instructions. If I find a good link, I'll be sure to post it. Maybe someone else could use too.
OK. I think I found enough info on how to change T-Stat, so I should be able to do it at home.
And I think I just realize that I replaced the wrong sensor. I think I should have replace "DOUBLE TEMPERATURE SWITCH / Part #13621703993". But I replaced the "Auxiliary Fan Switch / Coolant Temperature sensor / Part #13621433077)
So I am not even sure if I even need new T-Stat, but due to mileage I think I should change it.
What I did, and it seemed to work ok for me (on a cold engine). Fit all your hoses except the top radiator hose on the block. Pour coolant in through the hose until you have coolant appearing in the block outlet. If you can put your car nose up (on ramps is good) it helps to purge the air from the system. Connect the hose to the block outlet, check the expansion tank levels and then start the engine with the heater on max heat. Keep an eye on the level with in your expansion tank, you should see the level falling as air bubbles are purged from the system, once the tank level starts to rise, put the expansion tank cap back on and open the purge valve (if you have one) near the expansion tank. Once you have just coolant being bled out this valve, close the purge valve and go for a drive, keep an eye on the temperature guage and pay attention to whether or not you are getting warm air from your heater vents. Check the expansion tank levels every day or two for a week to 10 days, or until you don't need to top up the expansion tank. Use your normal precautions around hot cooling systems to avoid being scalded.
Could T-Stat fix itself.....yes, I know its sounds silly......but I am having something rather odd with my M5.
So I changed top Coolant Temperature sensor. Reset the system. Drove for couple of days, SES Light came one, Code 69.
I reset it drive for for couple more days. Again SES Light came one, Code 69.
I did another reset. Couple days later, same thing, Code 69. So I figure T-Stat is done. Ordered new one on line.
Since temps were normal, I continued driving my car. After about 3 days of driving, SES light turned off by itself and has not been back for about 3 days.............Could anyone explain why?and should I still change the T-Stat?
Well, SES came back on my way home. I have not checked code, but I am 99.9999% sure its code 69. So planning to change T-Stat this coming Sat or Sun. Hopefully won't see SES light again. (I really hate that light..............LOL).
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