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ABS/Tractiob/Brake Lights on But No DTCs


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AlpineSeeker
New User

Apr 2, 2024, 8:17 PM

Post #1 of 4 (8125 views)
ABS/Tractiob/Brake Lights on But No DTCs Sign In

Hello all,
Recently while driving my wife's 2013 Nissan Sentra the traction control light came on followed by what felt like the transmission starting off in second gear. Then the ABS light came
on and I returned home. I hooked up my Thinktool Pro and scanned for codes and found a usual MAF Code (P0101) and a new code C1130-00 Engine Signal code. Thinking of a bad wheel speed sensor I graphed all four and drove the car and saw no difference in any of the sensors. I cleared the codes and rechecked and everything was normal so I drove over to get the oil changed and while waiting in line the ABS, Traction, and Brake light came on again together this time. I again scanned for codes but found no codes in the car at all I was hoping that someone could let me know how a car can have several lights on and yet not set any DTC's? I thought about communication issues but if a module wasn't communicating with the ECM shouldn't there be a code? Also if there was a power/ground issue in a module would that generate a DTC? Two days before I had the car into the Nissan dealer for a security issue recall involving a ECM reprogram and asked them to check on the recurring MAF DTC that I found a tech service bulletin on (another ECM reprogram) but instead they did a $225 diag and came up with $900 in suggested repairs on other things but did nothing with the MAF. Since they checked the brakes I was thinking that they may have damaged the wheel speed sensors causing my issue but the signals from the sensors look stable and consistent with each other. I am at a loss on this and before I start unplugging modules I wanted to ask the forum for advice on this. Thanks so much and I look forward to hearing from anyone soon.
Best Regards, Ross


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 3, 2024, 4:24 AM

Post #2 of 4 (8117 views)
Re: ABS/Tractiob/Brake Lights on But No DTCs Sign In


Quote
I am at a loss on this and before I start unplugging modules


How is that going to fix anything?

Not all scan tools are equal, especially the Chinese stuff. Some scanners miss stuff on various makes and models. It's also possible that it's a module failure with intermittent glitches.
It appears you are looking for a momentary glitch somewhere that won't be easy to find. You may have to use a scan tool capable of recording or a lab scope to find this glitch.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



AlpineSeeker
New User

Apr 6, 2024, 12:48 AM

Post #3 of 4 (8040 views)
Re: ABS/Tractiob/Brake Lights on But No DTCs Sign In

Hello Hammer time,
Thank you so much for your reply and I would not randomly unplug any module without going through other checks first and that would be to check the plug and pins for possible corrosion or damaged pins. I had the CVT Transmission replaced at a shop a few years back and after that had an oil pressure light issue that was caused by damaged pins at the ECM connector. I had the car towed to the dealer and they were able to find it and repair it so I can't rule out the connections. You are definitely correct that a lab scope would probably be a good place to start, especially with intermittent problems and I have a pico scope but I was hoping for advice on where to start looking with it as I am not sure if the ECM Module and/or the ABS module would be the cause of an issue like this and would it be a voltage signal or a CAN Bus signal? I also have a Snap-on scanner that I will try tomorrow to see if I have any DTC's that show up with that on this car just to see if maybe the Thinktool is indeed missing something. I look forward to your thoughts on this and thank you so much for your help. Take care and have a great weekend.
Best Regards,
Ross


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 6, 2024, 4:15 AM

Post #4 of 4 (8035 views)
Re: ABS/Tractiob/Brake Lights on But No DTCs Sign In

You probably want to concentrate on the MAF issue as that can also effect traction control.
If you truly have a CAN communication issue, then you should have some "U" codes to point you in the right direction.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







 
 
 






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