Diagnostic a 2021 Peugeot e208

[deadrabbit87]

Hi,

I'm trying to read some data from my Peugeot 208e. Unfortunately I could not establish any working condition or read some data from any ecu of my car.

Could someone provide a working condition for a working starting point?

I'm using this sketch https://github.com/ludwig-v/arduino-psa-diag with an Arduino Nano.

Here is output from my RCC:

2026-01-24 16:12:36.102361 --| > V
2026-01-24 16:12:36.133051 --| < Ready...
2026-01-24 16:12:36.137949 --| >R
2026-01-24 16:12:36.143442 --| < 2.0
2026-01-24 16:13:14.010748 --| > >764:664
2026-01-24 16:13:14.042672 --| < OK
2026-01-24 16:13:14.047632 --| > KU
2026-01-24 16:13:14.052535 --| < OK
2026-01-24 16:13:14.056007 --| > 1003
2026-01-24 16:13:19.057704 --| < Timeout
2026-01-24 16:13:19.063252 --| Open Diagnostic session: Failed (Timeout)
2026-01-24 16:13:19.068083 --| Open Diagnostic session: Failed/Stopping (OK)

But also trying without json zone files are not leading to any sucess:

2026-01-24 16:37:56.748034 --| > V
2026-01-24 16:37:56.774910 --| < Ready....
2026-01-24 16:37:56.779768 --| > R
2026-01-24 16:37:56.785223 --| < 2.0
2026-01-24 16:38:00.223095 --| >7E5:665
2026-01-24 16:38:00.227225 --| OK
2026-01-24 16:38:12.570613 --| 1003
2026-01-24 16:38:12.573781 --| OK
2026-01-24 16:38:25.738769 --| 22F190
2026-01-24 16:38:30.753015 --| Timeout

Anyone knows a save working PID from an electric Peugeot 208 / 2008 or Opel Corsa electric / Mokka electric?

[16D]

Does this arduino works with vlud programs?

[deadrabbit87]

Hi,

Yes, It is working.

The only point which is not fully clear to me: Should i connect GND from the car also to the mcp/arduino?

[pagautas]

try vlud version 1.9

[16D]

I'm using without connecting GND to OBD

[deadrabbit87]

Which Version of vlud and which PIDs or ECUs?

[Barracuda09]

These replies seems to be out of order:

2026-01-24 16:37:56.748034 --| > V
2026-01-24 16:37:56.774910 --| < Ready....   <-- What is this and were does it come from? Which sketch are you using
2026-01-24 16:37:56.779768 --| > R
2026-01-24 16:37:56.785223 --| < 2.0

V should give 1.9 or 2.0 not Ready....

Questions:

• Which version of PyPSADiag are you using
• Which sketch are you using
• Which hardware like Arduino R4 or Nano etc.

[Barracuda09]

See this https://github.com/Barracuda09/PyPSADiag/wiki/Hardware

[deadrabbit87]

But it's a electric 208, therefore i thought it is the platform NEA2020 and i have to use Pin 6/14?

[Barracuda09]

Ok that could be OK (I have no experience with newer cars.

But what about :

What is the sequence of the log without the Ready....?

[deadrabbit87]

Using Pins 3/8 doesn't changes anything:

2026-01-26 17:26:24.356070 --|  > V
2026-01-26 17:26:24.394943 --|  < 2.0
2026-01-26 17:26:24.399131 --|  > R
2026-01-26 17:26:24.416104 --|  < OK
2026-01-26 17:26:27.131833 --|  >7E5:665
2026-01-26 17:26:27.139021 --|  OK
2026-01-26 17:26:32.092991 --|  1003
2026-01-26 17:26:37.103919 --|  Timeout

[Barracuda09]

Maybe you need to check the 120 Ohm termination resistor

[pagautas]

e208 is not NEA2020, e308 is

[deadrabbit87]

are you sure about this? For me it's not fully clear if i have to use Pins 6/14 or 3/8....

[Barracuda09]

You need to check/add 120 Ohm termination resistor

[16D]

">7E5:665" What module is that?

You get this respond in all ECU?

[deadrabbit87]

It's wrong, this was my fault. But it also doesn't work with zones files.

I always get the timeout response.