flashing 4th and D Tiptronic
04-23-2019, 03:42 PM
#16
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your reply is full of information and detail. The forum should be thankful. I would like to cross post this into some other forums for the greater good, assuming that's ok.
Thank you for the time you took in compiling. I found it VERY helpful.
your reply is full of information and detail. The forum should be thankful. I would like to cross post this into some other forums for the greater good, assuming that's ok.
Thank you for the time you took in compiling. I found it VERY helpful.
07-01-2019, 11:42 PM
#17
Thank you for the information. I'm experiencing exactly the same issue and need to replace the ATF wiring harness. What does it take? Can it be done without taking down the transmission? Thanks
07-02-2019, 10:38 AM
#18
If by taking down the transmission you mean removing the gearbox from the car, no it is not necessary.
You just need to remove the oil pan to access and change over the harness. Obviously drain as much fluid as possible beforehand.
Trust all goes well for you.
You just need to remove the oil pan to access and change over the harness. Obviously drain as much fluid as possible beforehand.
Trust all goes well for you.
07-02-2019, 11:44 PM
#19
How often should the harness in the transmission be changed, getting ready to change the oil, would be a good time while the pan is off, or can you just change the connector seals where it comes out of transmission.
01-30-2023, 02:01 AM
#20
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Need recommendation
Hello,
I hope someone can provide a recommendation. I have a 1997 Porsche Boxster and experiencing the flashing 4th and D Tiptronic. When I reset the codes using my ODB2 scanner it fixes the issue even though I have no codes. The car runs fine, but when I turn off the car and restart the flashing issue comes back. From reading this thread, it looks like I need to possibly replace the gear selection switch, which cost about $400 for the part. Before purchasing and working on replacing are there any other checks that you can recommend to confirm that this is what's causing my issue?
Thanks all
I hope someone can provide a recommendation. I have a 1997 Porsche Boxster and experiencing the flashing 4th and D Tiptronic. When I reset the codes using my ODB2 scanner it fixes the issue even though I have no codes. The car runs fine, but when I turn off the car and restart the flashing issue comes back. From reading this thread, it looks like I need to possibly replace the gear selection switch, which cost about $400 for the part. Before purchasing and working on replacing are there any other checks that you can recommend to confirm that this is what's causing my issue?
Thanks all
02-20-2023, 01:30 AM
#21
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Flashing 4th gear to D - error code 37 on boxster S 2002
I purchased a 2004 Boxster 2.7 with Tiptronic just coming up on 3 years ago. Presently, the speedo is showing around 150,000 km.
My car has had this problem for some time, albeit with no change to the functioning of the gearbox - no slippage, normal change up/down, manual changing, instantaneous kick-down in auto mode etc, and certainly no initiation of the reduced driving programme (the so-called limp mode).
I raised the D-4 flashing issue with a highly respected Porsche specialist workshop when they were (expensively) just activating the OBC hack, that I had done myself.
I had engaged this shop to do the PPI for me when I bought the vehicle. In addition, the maintenance handbook I inherited with the car showed that this shop had actually serviced the vehicle on a regular basis for the previous owner over a period of 5 years. So presumably they knew a bit about my car.
Their response re the D-4 experience was extremely under-whelming - a shrug of the shoulders, and I quote: "It's just a Porsche thing".
Very comforting, I don't think, in light of the dire warnings in the owner's manual.
So what does one do? Because it's a bloody annoying irritation every time you drive the car, not knowing if it's going to implode miles from home.
Whilst I am thankful for these forums, I believe one should only comment on issues if one has something to offer, not just guessing or repeating something one read on another forum. And when the initial poster of the problem arrives at a successful solution of their problem, it would be nice, and only courteous. to return to the forum and advise others of the fix and how it was achieved. Very rarely happens - lots of problems, not many validated solutions.
Accordingly, that's what I'm trying to do.
Our gearbox, a ZF type 5HP19FL, is nothing special; it's in oodles of Audis, BMWs and VWs through the same years as the 986 Boxster.
Submerged in the fluid inside is a wiring harness that connects to various bits.
There is a 2-wire thermistor that pokes its head out of this wiring harness; this is the ATF temperature sensor. It would appear that its plastic shrouding breaks down with heat and age, causing the device to malfunction and transmit spurious and/or no signals to the transmission control module.
In my case the removed harness also displayed evidence of similar brittleness with the plastic electrical connectors that connect to the various solenoid valves.
To sum up, if you have
Replace the gearbox internal wiring harness and your problem will be solved. (You have to buy the whole thing as the thermistor is intergral and cannot be purchased separately)
Don't take notice of comments about the transmission fluid level or purity, it's a furphy - in any case you'll have to drop the bottom to access the harness, so you will need to replenish with new fluid.
Happy motoring!
Wiring Harness Part Nos
Porsche 986 325 611 00
ZF 1056 227 046 01
My car has had this problem for some time, albeit with no change to the functioning of the gearbox - no slippage, normal change up/down, manual changing, instantaneous kick-down in auto mode etc, and certainly no initiation of the reduced driving programme (the so-called limp mode).
I raised the D-4 flashing issue with a highly respected Porsche specialist workshop when they were (expensively) just activating the OBC hack, that I had done myself.
I had engaged this shop to do the PPI for me when I bought the vehicle. In addition, the maintenance handbook I inherited with the car showed that this shop had actually serviced the vehicle on a regular basis for the previous owner over a period of 5 years. So presumably they knew a bit about my car.
Their response re the D-4 experience was extremely under-whelming - a shrug of the shoulders, and I quote: "It's just a Porsche thing".
Very comforting, I don't think, in light of the dire warnings in the owner's manual.
So what does one do? Because it's a bloody annoying irritation every time you drive the car, not knowing if it's going to implode miles from home.
Whilst I am thankful for these forums, I believe one should only comment on issues if one has something to offer, not just guessing or repeating something one read on another forum. And when the initial poster of the problem arrives at a successful solution of their problem, it would be nice, and only courteous. to return to the forum and advise others of the fix and how it was achieved. Very rarely happens - lots of problems, not many validated solutions.
Accordingly, that's what I'm trying to do.
Our gearbox, a ZF type 5HP19FL, is nothing special; it's in oodles of Audis, BMWs and VWs through the same years as the 986 Boxster.
Submerged in the fluid inside is a wiring harness that connects to various bits.
There is a 2-wire thermistor that pokes its head out of this wiring harness; this is the ATF temperature sensor. It would appear that its plastic shrouding breaks down with heat and age, causing the device to malfunction and transmit spurious and/or no signals to the transmission control module.
In my case the removed harness also displayed evidence of similar brittleness with the plastic electrical connectors that connect to the various solenoid valves.
To sum up, if you have
- the D-4 flashing thingo happening on your dash AND
- the transmission does not go into 'limp' mode during those occurrences
Replace the gearbox internal wiring harness and your problem will be solved. (You have to buy the whole thing as the thermistor is intergral and cannot be purchased separately)
Don't take notice of comments about the transmission fluid level or purity, it's a furphy - in any case you'll have to drop the bottom to access the harness, so you will need to replenish with new fluid.
Happy motoring!
Wiring Harness Part Nos
Porsche 986 325 611 00
ZF 1056 227 046 01
you are absolutely correct because that’s exactly the recommended diagnosis from the mechanic of the previous owner. Just purchased the car. Previous owner did not fix that problem, put about 2K miles on the car… Just have one question to you. Do you think it will damage the car if driven like that? No issue with gears, or anything.. drives like a baby… but that annoying faulty sensor error keeps blinking on and off…
also not sure if you or anyone knows any good mechanics for this around the Los Angeles or South Bay Area (California).
how much did it cost you for this?
05-05-2023, 03:44 AM
#22
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I'm a newbie
I have similar problem however, the Porsche mechanic connected his computer and could not find any faults, so recommended replacing the Gearbox multifunction switch, probably £350 to buy, so don't want to do this and waste my money.
Anyway have you solved the problem by replacing the wiring harness?
I have similar problem however, the Porsche mechanic connected his computer and could not find any faults, so recommended replacing the Gearbox multifunction switch, probably £350 to buy, so don't want to do this and waste my money.
Anyway have you solved the problem by replacing the wiring harness?
05-11-2023, 02:55 PM
#23
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2002 tip, 986 S with 80K
Flashing 4th and D after warm up, however transmission works fine and the normal lights come back in a minute or so, go to 4th and D again, etc as I drive. Automatic and manual function fine, just dont get the feedback in the dash lights when its out.
I have heard this could be the transmission’s coolant vacuum valve. Does this circulate coolant through the transmission? That seems to be the simple fix and makes sense.
I had the transmission serviced, new fluid, filter etc about 6 months ago, but the problem didn't completely resolve. Now with the warmer weather, I'm thinking I should iron out this issue.
I have a durametric scanner, but it only shows alarm fault codes (historic, none present now) to be honest, I am not sure I'm using the durametric to its potential, it seems pretty lame when I do the short test on all modules, so I would welcome advice on this as well.
base question, assuming that coolant flows into tip, could a faulty transmission’s coolant vacuum valve contribute to heat issues on Tip?
Flashing 4th and D after warm up, however transmission works fine and the normal lights come back in a minute or so, go to 4th and D again, etc as I drive. Automatic and manual function fine, just dont get the feedback in the dash lights when its out.
I have heard this could be the transmission’s coolant vacuum valve. Does this circulate coolant through the transmission? That seems to be the simple fix and makes sense.
I had the transmission serviced, new fluid, filter etc about 6 months ago, but the problem didn't completely resolve. Now with the warmer weather, I'm thinking I should iron out this issue.
I have a durametric scanner, but it only shows alarm fault codes (historic, none present now) to be honest, I am not sure I'm using the durametric to its potential, it seems pretty lame when I do the short test on all modules, so I would welcome advice on this as well.
base question, assuming that coolant flows into tip, could a faulty transmission’s coolant vacuum valve contribute to heat issues on Tip?
We just had that same problem on a customer's tip. the flashing lights are actually a fault code. Checked everything and turned out to be the control unit. We have an extra one if you need, just check the sensor on the trans first and the wiring