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Intermittent trans failsafe message
after cresting a sharp hill, I drove through a long deep puddle at about 50 mph. It was unavoidable(the puddle stretched across both lanes and filled the ditches) and there wasn't enough room, between the crest of the hill and the beginning of the puddle to shave any real speed, so I was along for the ride. About mid-way through, the engine died and I coasted it onto the side of the road. The engine didn't suck water thankfully, but the dme got drenched and the car needed a few days, to dry out. Once the dme dried out, I discovered that the battery died, so I trickled that to full strength, cleaned out as many electrical connections as I thought were relevant, in the engine bay and she fired right up, no problem. This brings us to the current problem, which is that despite the battery being 100% charged and in good health and the charging system testing out as good; I have an intermittent trans failsafe message displaying. Strangely though, the vehicle has worked fine twice, without displaying the message, but re-displayed it after and every day since. my question now is, if the charging system is healthy and I know that the battery is fine and fully charged, what else might cause this problem? At first I thought that the tcm just needed more time to dry out, but with the problem returning after randomly going away, I no longer think that's it. I should probably mention that it will go into failsafe mode, regardless of how recently I drove it, what time of day it is, weather I'm manually shifting or not and regardless of how slowly, I feed in throttle input. If any of you have had a similar experience, please share your results! |
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#2
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#3
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It was likely over a foot deep, in the deepest part and 50-60 feet long; more of a pond on the road, really. The dme/tcm box, got saturated; I have no idea how it didn't also suck water.
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#4
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Did you get the X scan for any code in the TCM? Even if the Trans Fail goes away after a restart, you might have a code logged into memory. That will at least tell you why the trans is going into fail safe mode.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#5
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Working on that. The code reader at the local parts stores couldn't talk to the car, so we couldn't pull any info. Going to a BMW indy shop, next
Last edited by Jroc; 06-27-2016 at 10:54 AM. Reason: spelling |
#6
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You probably got intermittent elec shortage somewhere in the engine bay & underneath the car. A nice dry-out in the sun is the least you can do since you're in FL.
Let's imagine what happened when you hit the 1-foot puddle at 50MPH, First the water will gush into the grille, through radiator & fan, into engine bay. The first impact to the electric connectors would probably be CPS, VANOS solenoid and MAF, etc. I will check on every connector to see if there's any water residue. Going further back, O2 sensors, Throttle connector, DISA connector, etc. If you let me guess, I'd say MAF, but that's just shooting from my hip. Good luck!
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01' 3.0i E53 (M54) with 164,000 miles 07' 3.0si E83 (N52) with 134,000 miles 08' 3.0si E70 (N52) with 91,000 miles |
#7
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only 1 code was found: p1835. Having trouble finding a BMW-specific definition
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#8
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#9
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Did you also clean and dried the electrical connector at the trans?
__________________
2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#10
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P1835 - Transmission Transfer Case Differential Lock-Up Solenoid Short Circuit To Ground Assuming you have an LCI model, I'd suggest you look at the actuator motor and wiring on the transfer case. *edit* - just read some of your earlier posts and it seems you have an 02 4.4i? In that case, no transfer case actuator motor... So, back to upallnight's suggestion of the electrical connector on the transmission. Others have had intermittent trans fail safe issues when driving in the rain and traced the issue to this connector.
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Wayne 2005 BMW X5 3.0d (b 02/05) 2001 BMW F650GS Dakar (b 06/01) |
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