Anyone else have their TMAP sensor die as a result of a CP failure?

Just Ask · 06-16-2018, 09:32 PM

Just had a VRSF CP and FMIC installed after having my stock CP explode on me. Had a local BMW shop do the install and I now have the following 3 codes being set:
108A01-Charge air temp sensor, electrical:Short circuit to B+.
120408-Charging pressure control:Switch-off as consequence.
121001-Charging pressure sensor, electrical:Short circuit to B+.

Shop says that the TMAP sensor most likely was damaged during the process of the CP blowing. Car is holding boost but is in a reduced power mode and showing the much loved "Drivetrain Malfunction" warning upon startup. Searching here and Googling elsewhere all point to a TMAP sensor or harness issue related to those codes above. The harness looks physically fine and I'm unsure how to test it other than with visual inspection. I have ordered a new TMAP sensor which will arrive Monday - damn sure hope that replacement will cure my ills.

My main question is if anyone else had to replace their TMAP sensor as a result of their CP failing?

Dfahmy · 06-17-2018, 04:17 AM

Do you have a jb4, as it might be the short circuit issue ?

Just Ask · 06-17-2018, 04:33 AM

Quote:

Originally Posted by Dfahmy

Do you have a jb4, as it might be the short circuit issue ?

No, running Stage 1 MHD. Good question, as I note that quite a few folks have needed to manually ground the TMAP harness as a result of shorting out a circuit with the JB4.

Dfahmy · 06-17-2018, 05:10 AM

Quote:

Originally Posted by Just Ask

No, running Stage 1 MHD. Good question, as I note that quite a few folks have needed to manually ground the TMAP harness as a result of shorting out a circuit with the JB4.

Well in that case have you tried reading and clearing the codes through the MHD app, also do you have access to ISTA/d and an enet cable by any chance?

Just Ask · 06-17-2018, 09:30 AM

Quote:

Originally Posted by Dfahmy

Well in that case have you tried reading and clearing the codes through the MHD app, also do you have access to ISTA/d and an enet cable by any chance?

i have read and cleared the codes utilizing the MHD app, only to have them instantly reappear upon restarting the engine. I do not have access to ISTA, unfortunately.

zinner · 06-18-2018, 03:55 PM

I have had that TMAP fail just on it's own. The ECS Tuning VDO replacement works great.
ES#2992481, it seems it's 94 bux but it was 60 when I bought it a few months ago.

Just Ask · 06-30-2018, 01:38 AM

Update - Replaced the TMAP sensor in the CP and it had zero effect - same three codes still pop up. If I assume the new TMAP sensor is good, then I am left with trying to diagnose connectivity between the TMAP harness and the DME. Any ideas on how to do this?
I also switched the TMAp sensor in the CP with the MAP sensor in the intake manifold as they are the same part number; no change in codes so then I can assume that both sensors are good and the issue lies elsewhere.
Any advice on what to do at this point?

VT-man · 06-30-2018, 10:07 AM

I find it funny that everyone and their mothers jump on "Oh it's jb4 issue" for whatever issue nowadays.
Awaiting for "your car is low on air? Check JB4..."

izaazk · 06-30-2018, 10:27 PM

Quote:

Originally Posted by VT-man

I find it funny that everyone and their mothers jump on "Oh it's jb4 issue" for whatever issue nowadays.
Awaiting for "your car is low on air? Check JB4..."

My car is saying im low on windshield fluid?? should i check my jb4 tmap connection?

jgoens · 06-30-2018, 11:27 PM

Quote:

Originally Posted by Just Ask

i have read and cleared the codes utilizing the MHD app, only to have them instantly reappear upon restarting the engine. I do not have access to ISTA, unfortunately.

Why don't you get that going? Easy to do here or on Bimmerfest. Will help with code analysis.

Quote:

Originally Posted by VT-man

I find it funny that everyone and their mothers jump on "Oh it's jb4 issue" for whatever issue nowadays.
Awaiting for "your car is low on air? Check JB4..."

Quote:

Originally Posted by izaazk

My car is saying im low on windshield fluid?? should i check my jb4 tmap connection?

No shit. Now that MHD and BM3 is a better solution, all these people blame JB4 for everything. I've had two of them and they work great....and I have said at this point a flash is better but lets not fault the third horse that has been there for years.

Just Ask · 07-01-2018, 12:58 AM

Quote:

Originally Posted by jgoens

Why don't you get that going? Easy to do here or on Bimmerfest. Will help with code analysis.

The codes are as stated in my original post. Or are you saying I should post a log?

IK6SPEED · 07-01-2018, 01:51 AM

Quote:

Originally Posted by Just Ask

The codes are as stated in my original post. Or are you saying I should post a log?

He’s saying to get ISTA

Quote:

Originally Posted by Just Ask

No, running Stage 1 MHD. Good question, as I note that quite a few folks have needed to manually ground the TMAP harness as a result of shorting out a circuit with the JB4.

Have you set back to stock?

Just Ask · 07-01-2018, 02:08 AM

Quote:

Originally Posted by IK6SPEED

He’s saying to get ISTA

Ah, OK, thank you. Clarity for me comes in waves at times...lol. What is the first step in obtaining/using ISTA?

Quote:

Originally Posted by IK6SPEED

Have you set back to stock?

No, I have not tried that. Will do so later today and see if that helps at all. I have tried loading a different octane map from the Stage 1 choices with no change in codes but maybe jumping back to the stock map will be different. Worth a try for the small time investment!

IK6SPEED · 07-01-2018, 02:18 AM

Quote:

Originally Posted by Just Ask

Ah, OK, thank you. Clarity for me comes in waves at times...lol. What is the first step in obtaining/using ISTA?

http://f30.bimmerpost.com/forums/sho....php?t=1312102

Quote:

Originally Posted by Just Ask

No, I have not tried that. Will do so later today and see if that helps at all. I have tried loading a different octane map from the Stage 1 choices with no change in codes but maybe jumping back to the stock map will be different. Worth a try for the small time investment!

I would have spent the 60 seconds to do that prior to purchasing a new sensor.

Just Ask · 07-01-2018, 02:26 AM

Quote:

Originally Posted by IK6SPEED

http://f30.bimmerpost.com/forums/sho....php?t=1312102

I would have spent the 60 seconds to do that prior to purchasing a new sensor.

Thanks for the link...and yes, I wasted $145 on a sensor that I apparently don't need. A Fool and his money...

Just Ask · 07-01-2018, 03:05 PM

Although I don't have ISTA yet, I just realized that I received an ISTA printout at the time of install generated by the indy BMW shop. Codes are as follows:
108A01-Charge air temperature sensor, electrical:Short circuit to B+.
121001-Charging pressure sensor, electrical:Short circuit to B+.

These are exactly the same as what MHD indicates (the 120408 code comes and goes).

i also remapped to Stock map and no change...same codes.

_bdiddyb_ · 07-02-2018, 04:50 PM

@Just Ask, still problem? humor me man, do you know how to check the TMAP plug wire black/yellow for grounding? Do that and get back to us.

Just Ask · 07-02-2018, 09:47 PM

Quote:

Originally Posted by _bdiddyb_

@Just Ask, still problem? humor me man, do you know how to check the TMAP plug wire black/yellow for grounding? Do that and get back to us.

I tested for continuity by grounding the black/yellow TMAP wire to 4 different points on the frame....no continuity at all. Then I also tested for voltage by running multimeter between the black/yellow TMAP wire and the positive terminal in the engine bay...zero voltage. I then left the TMAP harness disconnected and used MHD to clear and read the newly generated codes. Same codes appear regardless of whether I have the TMAP harness plugged in or not plugged in, so it appears that wiring is the culprit. Should I try the JB4 ground "fix" by directly grounding that black/yellow TMAP wire?

_bdiddyb_ · 07-02-2018, 10:27 PM

haha - that was risky trying to test for +voltage that way. I would posi-tap the blk/yellow wire to ground then plug in the tmap and see. Doesn't hurt.

For your information, my tmap sensors are enroute. Couldn't wait so i decided to ground the black/yellow wire today. Drivetrain malfunction went away as soon as I turned on the car. I was able to finally clear the 2 codes with ISTA and they didn't come back after a drive. BM3 software came alive! Oh yes - exJB4 user here. Not going to say anything about that.

Just Ask · 07-03-2018, 06:26 AM

Quote:

Originally Posted by _bdiddyb_

haha - that was risky trying to test for +voltage that way. I would posi-tap the blk/yellow wire to ground then plug in the tmap and see. Doesn't hurt.

Gonna try that tomorrow. It would be one of the nicest Independence Day gifts I could give myself...lol.

Quote:

Originally Posted by _bdiddyb_

For your information, my tmap sensors are enroute. Couldn't wait so i decided to ground the black/yellow wire today. Drivetrain malfunction went away as soon as I turned on the car. I was able to finally clear the 2 codes with ISTA and they didn't come back after a drive. BM3 software came alive! Oh yes - exJB4 user here. Not going to say anything about that.

Why are you replacing both sensors? Preventative maintenance?

AMG KLR · 07-03-2018, 09:15 AM

There's 2 TMAPs, pre throttle and manifold. Maybe the other one was damaged? Use your original or replacement one and see if the code sticks when you change the other

_bdiddyb_ · 07-03-2018, 10:39 AM

@Just Ask, my research/troubleshooting quest shows some saying faulty sensors and some saying jenky jb4 wiring. I went ahead and ordered the sensors first.

06-16-2018, 09:32 PM	#1
Just Ask Noob 35 Rep 58 Posts Drives: 2012 335i Join Date: Feb 2016 Location: Pensacola, Florida iTrader: (0)	Anyone else have their TMAP sensor die as a result of a CP failure? Just had a VRSF CP and FMIC installed after having my stock CP explode on me. Had a local BMW shop do the install and I now have the following 3 codes being set: 108A01-Charge air temp sensor, electrical:Short circuit to B+. 120408-Charging pressure control:Switch-off as consequence. 121001-Charging pressure sensor, electrical:Short circuit to B+. Shop says that the TMAP sensor most likely was damaged during the process of the CP blowing. Car is holding boost but is in a reduced power mode and showing the much loved "Drivetrain Malfunction" warning upon startup. Searching here and Googling elsewhere all point to a TMAP sensor or harness issue related to those codes above. The harness looks physically fine and I'm unsure how to test it other than with visual inspection. I have ordered a new TMAP sensor which will arrive Monday - damn sure hope that replacement will cure my ills. My main question is if anyone else had to replace their TMAP sensor as a result of their CP failing?
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06-17-2018, 04:17 AM	#2
Dfahmy Second Lieutenant 140 Rep 216 Posts Drives: F30 335i PWG Join Date: Jan 2017 Location: Cairo,Egypt iTrader: (0) Garage List 2013 BMW 335i [0.00]	Do you have a jb4, as it might be the short circuit issue ? __________________ 2013 335i BSM ~ Stage 3 turbo, forged internals and more check out my build thread https://f30.bimmerpost.com/forums/sh...7#post23789807
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06-18-2018, 03:55 PM	#6
zinner Major 559 Rep 1,127 Posts Drives: `17 X5 35d/`15 335i/`18 M550IX Join Date: Oct 2014 Location: Raleigh, NC iTrader: (0)	I have had that TMAP fail just on it's own. The ECS Tuning VDO replacement works great. ES#2992481, it seems it's 94 bux but it was 60 when I bought it a few months ago.
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06-30-2018, 01:38 AM	#7
Just Ask Noob 35 Rep 58 Posts Drives: 2012 335i Join Date: Feb 2016 Location: Pensacola, Florida iTrader: (0)	Update - Replaced the TMAP sensor in the CP and it had zero effect - same three codes still pop up. If I assume the new TMAP sensor is good, then I am left with trying to diagnose connectivity between the TMAP harness and the DME. Any ideas on how to do this? I also switched the TMAp sensor in the CP with the MAP sensor in the intake manifold as they are the same part number; no change in codes so then I can assume that both sensors are good and the issue lies elsewhere. Any advice on what to do at this point? Last edited by Just Ask; 06-30-2018 at 05:50 PM..
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06-30-2018, 10:07 AM	#8
VT-man Private First Class 59 Rep 142 Posts Drives: 2014 435xi Join Date: Jul 2017 Location: Texas iTrader: (0)	I find it funny that everyone and their mothers jump on "Oh it's jb4 issue" for whatever issue nowadays. Awaiting for "your car is low on air? Check JB4..." __________________ 02AccordV6(sold) 03350zMT(sold) 04E46///M3MT(sold) 06RSXauto(sold) 07G35auto(sold) 2014F32bmw435MT 2017MacanGTS
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07-01-2018, 03:05 PM	#16
Just Ask Noob 35 Rep 58 Posts Drives: 2012 335i Join Date: Feb 2016 Location: Pensacola, Florida iTrader: (0)	Although I don't have ISTA yet, I just realized that I received an ISTA printout at the time of install generated by the indy BMW shop. Codes are as follows: 108A01-Charge air temperature sensor, electrical:Short circuit to B+. 121001-Charging pressure sensor, electrical:Short circuit to B+. These are exactly the same as what MHD indicates (the 120408 code comes and goes). i also remapped to Stock map and no change...same codes. Last edited by Just Ask; 07-01-2018 at 04:23 PM..
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07-02-2018, 04:50 PM	#17
_bdiddyb_ Lieutenant 215 Rep 558 Posts Drives: 2013 335i Join Date: Aug 2013 Location: California iTrader: (1)	@Just Ask, still problem? humor me man, do you know how to check the TMAP plug wire black/yellow for grounding? Do that and get back to us.
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07-02-2018, 10:27 PM	#19
_bdiddyb_ Lieutenant 215 Rep 558 Posts Drives: 2013 335i Join Date: Aug 2013 Location: California iTrader: (1)	haha - that was risky trying to test for +voltage that way. I would posi-tap the blk/yellow wire to ground then plug in the tmap and see. Doesn't hurt. For your information, my tmap sensors are enroute. Couldn't wait so i decided to ground the black/yellow wire today. Drivetrain malfunction went away as soon as I turned on the car. I was able to finally clear the 2 codes with ISTA and they didn't come back after a drive. BM3 software came alive! Oh yes - exJB4 user here. Not going to say anything about that.
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07-03-2018, 09:15 AM	#21
AMG KLR Captain 163 Rep 732 Posts Drives: 2018 440i GC Join Date: Nov 2013 Location: USA iTrader: (0)	There's 2 TMAPs, pre throttle and manifold. Maybe the other one was damaged? Use your original or replacement one and see if the code sticks when you change the other
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07-03-2018, 10:39 AM	#22
_bdiddyb_ Lieutenant 215 Rep 558 Posts Drives: 2013 335i Join Date: Aug 2013 Location: California iTrader: (1)	@Just Ask, my research/troubleshooting quest shows some saying faulty sensors and some saying jenky jb4 wiring. I went ahead and ordered the sensors first.
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