|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
10-15-2014, 03:47 PM | #1 |
I plead the 5th.
529
Rep 1,519
Posts |
Oil Temp Gauge Maxes Out? [09/19 - PROBLEM SOLVED]
Recently my battery died out and seemingly killed the alternator as a result. Got the alternator rebuilt and first drive in the car afterwards, the oil temp gauge shot straight up to max after a few miles. No other warning lights or issues.
At this point, the oil leveling/temp sensor has been replaced, wiring inspected, and DME updated but the car still has the issue. Any thoughts or ideas?
__________________
-Matt
Last edited by tiltmode43; 09-19-2016 at 11:48 AM.. |
10-15-2014, 10:03 PM | #2 |
My other car is on Mars
639
Rep 3,124
Posts |
Can you check the oil temp with INPA?
If it says it's a zillion, then it's a sensor or sensor wiring. If it says 200 ish, then it's the instrument cluster.
__________________
Warning: May contain traces of nuts.
|
Appreciate
0
|
10-17-2014, 12:37 PM | #3 |
I plead the 5th.
529
Rep 1,519
Posts |
Yeah, really seems like a straight forward diagnosis. I'm wondering if the shop did this to determine my oil temp sensor was bad before replacing it or made the assumption based on other diagnosis. Thanks for the tip, we'll see what happens!
__________________
-Matt
|
Appreciate
0
|
10-29-2014, 01:11 PM | #4 | |
I plead the 5th.
529
Rep 1,519
Posts |
Quote:
Any other ideas on this one? The shop told me they also had inspected the wiring as well and everything seemed alright.
__________________
-Matt
|
|
Appreciate
0
|
10-29-2014, 02:13 PM | #5 | |
Major General
428
Rep 5,329
Posts |
Quote:
surely that tell you its the sensor. I've had faulty new items numerous times or they we damaged on install, quite easy with tight to reach sensors. more than you'd believe anyway.
__________________
Z4MR VT2 - Clubsport build.
Multi award winning Detailing | Wrap | PPF specialists UK based - www.topwrapz.com |
|
Appreciate
0
|
10-29-2014, 06:12 PM | #6 | |
I plead the 5th.
529
Rep 1,519
Posts |
Quote:
If anyone else has any ideas in the meantime, please share
__________________
-Matt
|
|
Appreciate
0
|
10-30-2014, 03:37 AM | #8 |
Major General
428
Rep 5,329
Posts |
wheres the oil temp sensor? bummer that the oil needs to be drained and this is a common part to fail on these engines.
__________________
Z4MR VT2 - Clubsport build.
Multi award winning Detailing | Wrap | PPF specialists UK based - www.topwrapz.com |
Appreciate
0
|
11-02-2014, 02:54 PM | #9 | |||
I plead the 5th.
529
Rep 1,519
Posts |
Quote:
Did some more research and found this info on another forum regarding S54 oil level/temp sensor, and how it determines the oil temp. Thought it was interesting, so adding to this thread in case anyone comes across it in time to come. Quote:
Quote:
__________________
-Matt
|
|||
Appreciate
0
|
07-17-2015, 03:07 PM | #11 |
Captain
638
Rep 956
Posts |
Check the connectors, if there is corrotion you can get the wrong values. Had that in my E34 M5 and it read -37 degrees celsius (outside temp) in the middle of summer. If the connectors look fine the wiring at the connector might be faulty which can get you the same fault. New stumps of wire with new connectors can be bought at your dealer.
|
Appreciate
0
|
09-13-2016, 11:41 AM | #12 | |||
I plead the 5th.
529
Rep 1,519
Posts |
Negative.
2 Years later, I still haven't actually fixed this issue (and sadly haven't driven the car a whole lot for a few reasons). However smog is (past) due and I need to sort this. These were the steps I had taken up to today: -Replaced the oil temp/level sensor twice (thought it could have been a bad sensor first time around) -Checked under hood fuses -Checked wires -Checked the physical gauge dial itself (Put the dash in diagnostic mode to read the actual temp on the LCD screen, which also went to max at same time the dial swept to max - the dial seems to be working in accordance with the data it's provided) I racked my brain around the symptoms again: -Oil temp gauge reads correct when the engine is off, but ignition turned to ON. In other words, I can run the car for an hour, turn it off, then turn key to ON, and the temp gauge will go to the correct location -Oil temp gauge reads correct when vehicle is at idle but as the RPM's increases, the temp gauge will then go to max. It will not come back down afterwards until vehicle is shut off. -SES codes: 2E9F oil condition sensor 2EA1 oil condition sensor, communication -NO other symptoms or issues with the vehicle at this time. Everything runs beautifully, no overheating, no warning lights, nothing. My alternator is charging at 14.1-14.2V under load, no issues with any accessories. -This issue started occurring immediately after I had my alternator replaced. At the time the shop didn't think it could be related and had advised I take the car to the stealership. I didn't question this much - the alternator seemed to be doing it's job and there were no other malfunctions. In some searching, I came across this thread -> http://www.zpost.com/forums/showthread.php?t=1246045 where forum member rmousir was having different issues after replacing the alternator, but also related to the oil condition sensor. Punisher3.0si came in and made the following posts: Quote:
Quote:
Quote:
I've just ordered an alternator for under $300 shipped and will have it by this weekend. I'll be replacing it by following this Pelican Parts DIY -> http://www.pelicanparts.com/techarti...eplacement.htm with hopes that this somehow fixes this issue. It feels kind of silly to be purchasing an alternator to try and fix this (considering mine is 'functioning' okay), but I'm not sure where else to go from here. If anyone has any ideas please let me know, otherwise I'll update this thread after the weekend passes. This is an idea, don't know if it makes sense from an electrical point of view but this isn't exactly my field The Z4M alternator is rated at 150 Amps. I believe the non-M alternator is rated at 155 Amps. Does anyone know if the alternators are physically interchangeable? If so, I wonder if the shop could have installed a non-M alternator into my vehicle with a rating of 155 Amps? Maybe when the alternator is pushing more as the RPM's climb, those extra 5 amps trip up the oil sensor? I'd imagine the amperage is regulated by the DME but considering this sensor is directly on the same circuit, maybe it's an exception. This is my theory, we'll see what happens!
__________________
-Matt
|
|||
Appreciate
0
|
09-13-2016, 11:39 PM | #13 |
Down Under!!
1654
Rep 4,318
Posts |
Hey bud, are you sure the wires are not hooked up back the front on the sensor? Is that possible? Or is it socketed? I can believe 1 sensor being bad, even 2 maybe, but 3???? There has to be something else at Play.. what's the alternator putting out? How's your hot Batt bus voltage? Any other strange issues? Can you check the voltage on the bus, the voltage the alt is putting out seems correct.
|
Appreciate
0
|
09-14-2016, 10:19 AM | #14 |
Lieutenant
303
Rep 414
Posts |
The fact that the sensor works correctly with engine off but incorrectly with engine on (different alternator loads) also suggests the alternator as the culprit. Good luck and report back!
|
Appreciate
1
tiltmode43528.50 |
09-19-2016, 10:20 AM | #15 |
I plead the 5th.
529
Rep 1,519
Posts |
SUCCESS!
Replaced the alternator yesterday and voila, my oil temp gauge no longer goes to max! The stickers on my old alternator did show it was the proper 150 amp unit intended for the M so not exactly sure what was wrong with it. I still find it so odd that it was pumping out a consistent 14.1-2 volts as it should have yet would trip up the gauge. In either case, I'm just glad this gremlin is no longer around.
__________________
-Matt
|
09-19-2016, 10:47 AM | #16 |
Lieutenant General
2444
Rep 11,667
Posts |
great stuff Matt, glad to hear you got it sorted!
and thanks for assembling the other old posts in this thread for future reference.
__________________
'21 M2C Hockenheim Silver
'18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold) |
Appreciate
1
tiltmode43528.50 |
09-19-2016, 12:17 PM | #17 | |
I plead the 5th.
529
Rep 1,519
Posts |
Quote:
If somebody, somewhere, some day has the same symptoms hopefully they will stumble across this thread and realize the alternator and temperature gauge are uniquely linked, potentially saving them time/headache/$$$!
__________________
-Matt
|
|
Appreciate
0
|
09-21-2016, 11:04 AM | #18 |
Down Under!!
1654
Rep 4,318
Posts |
Great stuff Matt, so glad you got this sorted mate, maybe the voltage was the same, but the amperage was different?
Either way, great news
__________________
2007 EuroSpec Z4///MC - Building/Developing Z4 GT3
Powered by |
Appreciate
0
|
09-21-2016, 10:05 PM | #19 |
Captain
249
Rep 758
Posts |
Sounds like the BSD data interface on the alternator was bad, and the data from the oil sensor was never making it to the instrument cluster once the alternator started transmitting its data.
__________________
Top Down 365
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|