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Author Topic: Dtc u2100 and 2108  (Read 303 times)

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olm

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Dtc u2100 and 2108
« on: 29 May 2025, 04:19:49 »
Hello everyone.
I've recently been seeing these fault codes intermittently. The ABS and TCS lights come on, and the speedometer stops displaying.
It seems to be a CAN bus issue. Could it be the ABS sensor that measures speed, or should I look at something else?
Thanks.
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TheBoy

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Re: Dtc u2100 and 2108
« Reply #1 on: 29 May 2025, 14:20:53 »
Now about to look up codes currently, but what codes are in the gearbox and abs ecus?
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olm

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Re: Dtc u2100 and 2108
« Reply #2 on: 29 May 2025, 17:02:35 »


Quote from: TheBoy on 29 May 2025, 14:20:53
Now about to look up codes currently, but what codes are in the gearbox and abs ecus?


None, only those DTCs appear. It's manual
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TheBoy

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Re: Dtc u2100 and 2108
« Reply #3 on: 30 May 2025, 14:01:08 »
Quote from: olm on 29 May 2025, 17:02:35


Quote from: TheBoy on 29 May 2025, 14:20:53
Now about to look up codes currently, but what codes are in the gearbox and abs ecus?


None, only those DTCs appear. It's manual
Is your reader capable of reading ABS, or is it only a generic OBDII reader?
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olm

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Re: Dtc u2100 and 2108
« Reply #4 on: 01 June 2025, 12:47:00 »
Quote from: TheBoy on 30 May 2025, 14:01:08
Quote from: olm on 29 May 2025, 17:02:35


Quote from: TheBoy on 29 May 2025, 14:20:53
Now about to look up codes currently, but what codes are in the gearbox and abs ecus?


None, only those DTCs appear. It's manual
Is your reader capable of reading ABS, or is it only a generic OBDII reader?

It's a Delphi system, but it can't find anything in the brakes section. Now I've seen P0500, which is the speed sensor. Could you tell me which sensor it is? I imagine it's one of the ABS sensors?
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TheBoy

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Re: Dtc u2100 and 2108
« Reply #5 on: 01 June 2025, 14:25:11 »
You need to read the ABS system to discover what is causing it, and if it is one of the ABS wheel sensors.

The engine ECU complaining about road speed will be a sign the ABS isn't happy with something, but you do need to interrogate the ABS to find out what.
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olm

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Re: Dtc u2100 and 2108
« Reply #6 on: 01 June 2025, 17:09:47 »
Quote from: TheBoy on 01 June 2025, 14:25:11
You need to read the ABS system to discover what is causing it, and if it is one of the ABS wheel sensors.

The engine ECU complaining about road speed will be a sign the ABS isn't happy with something, but you do need to interrogate the ABS to find out what.

Wow, I can't find anything in the brakes section. I'll ask a friend who has an Autel machine to see if that one can read it.
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Doctor Gollum

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Re: Dtc u2100 and 2108
« Reply #7 on: 01 June 2025, 21:02:09 »
Quote from: olm on 01 June 2025, 12:47:00
Quote from: TheBoy on 30 May 2025, 14:01:08
Quote from: olm on 29 May 2025, 17:02:35


Quote from: TheBoy on 29 May 2025, 14:20:53
Now about to look up codes currently, but what codes are in the gearbox and abs ecus?


None, only those DTCs appear. It's manual
Is your reader capable of reading ABS, or is it only a generic OBDII reader?

It's a Delphi system, but it can't find anything in the brakes section. Now I've seen P0500, which is the speed sensor. Could you tell me which sensor it is? I imagine it's one of the ABS sensors?
0500 is a general fault. The specific sensors will have a number allocated to them 0xx1, 0xx2 etc
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