NefMoto > Technical > Communication Protocols > UDS - VAG DTC to P Code
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Author Topic: UDS - VAG DTC to P Code  (Read 8337 times)
SB_GLI
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« on: May 19, 2019, 08:24:10 PM »
When reading diagnostic trouble codes via UDS, the codes that are reported are VAG specific trouble codes.  I've searched a bit around the wonderful world wide web and have been unable to find a translation from the VAG codes to their associated P-Codes, or any other description about them.

For example, VCDS reads this:

6372 - Control Module Malfunction - DBW Throttle Monitoring
          P1388 00 [032] - -
          Intermittent - Not Confirmed - Tested Since Memory Clear

"6372" is the number that is returned from the ReadDTCInformation UDS service (0x19).  P1388 needs to be translated from this.  Does any one know where one can obtain information regarding these manufacturer specific DTCs?
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H2Deetoo
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« Reply #1 on: May 20, 2019, 05:03:01 AM »
Maybe just parse VCDS's label files?
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k0mpresd
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« Reply #2 on: May 20, 2019, 05:05:30 AM »
Quote from: H2Deetoo on May 20, 2019, 05:03:01 AM
Maybe just parse VCDS's label files?

he is asking where does rosstech acquire the information to build the label files.
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SB_GLI
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« Reply #3 on: May 20, 2019, 05:17:07 AM »
Quote from: H2Deetoo on May 20, 2019, 05:03:01 AM
Maybe just parse VCDS's label files?

These are encrypted.
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phila_dot
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« Reply #4 on: May 20, 2019, 06:52:14 AM »
P codes are referenced in the ECU
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SB_GLI
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« Reply #5 on: May 20, 2019, 08:12:23 AM »
Quote from: phila_dot on May 20, 2019, 06:52:14 AM
P codes are referenced in the ECU
Is this something that can requested via UDS (with or without security access)?  Any additional details?
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prj
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« Reply #6 on: May 20, 2019, 10:43:19 AM »
SIMOS has ASAM embedded into the binary, look at the full dump.
For Bosch you need the ASAM file or dump ODIS.
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H2Deetoo
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« Reply #7 on: May 20, 2019, 11:56:55 PM »
What I meant to say was, if RT has already made a link from one code to the other then why not use that info?
And indeed they are encrypted but can easily be decrypted.
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SB_GLI
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« Reply #8 on: May 21, 2019, 04:38:32 PM »
I've learned that VCDS stores this data in encrypted .rod files.  Fun.
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SB_GLI
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« Reply #9 on: June 05, 2019, 02:21:01 PM »
I've found that this information is in the FR document under the ERRM section, although it'd take a bit of trickery to parse this info out of the doc with the goal of displaying to the end user so that it's understandable.
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