# 2009 Volkswagen Jetta TDI 2.0L ( CAN & kwp200 Protocol Question)

**URL:** <https://community.cartalk.com/t/2009-volkswagen-jetta-tdi-2-0l-can-kwp200-protocol-question/171438>\
**Category:** General Discussion\
**Tags:** volkswagen\
**Created:** [October 21, 2020, 4:46pm UTC](https://community.cartalk.com/t/2009-volkswagen-jetta-tdi-2-0l-can-kwp200-protocol-question/171438 "2020-10-21T16:46:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![linuxbrk\_171719](https://avatars.discourse-cdn.com/v4/letter/l/ecccb3/32.png) [@linuxbrk\_171719](https://community.cartalk.com/u/linuxbrk_171719)\
**Post date:** [October 21, 2020, 4:46pm UTC](https://community.cartalk.com/t/2009-volkswagen-jetta-tdi-2-0l-can-kwp200-protocol-question/171438/1 "2020-10-21T16:46:00Z")

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I have 2009 Volkswagen Jetta TDI diesel 2.0L, they saying this car required CAN bus system instead kwp2000.

My question is:

How does the protocol Id change? Maybe ECU is defective? Some people told me that OBD2 talking with different module from ECU.

from the car:

```
Protocol: KWPS8FE9 ( should be CAN )
ECU Address(es): 1A
CAL ID(Calibration ID): 02F300050D 1402 ( they say wrong CAL ID )
CAL CVN(Calibration Verification Number): 21DB ( they say wrong CAL CVN )

```

If you look at those monitors not supported.

OBDII Readiness Monitor Details:

```
Misfire Monitor Supported: N
Fuel System Monitoring Supported: N
Component Monitor Supported: Y
Catalyst Monitor Supported: N
Heated Catalyst Supported: N
EVAP System Supported: N
Miss Monitor Ready: NS
Fuel System Monitor Ready: NS
Component Monitor Ready: NS
Catalyst Monitor Ready: NS
Heated Catalyst Monitor Ready: NS
EVAP Monitor Ready: NS

```

How is it possible ECU unit created not belong to this vehicle CAL ID (Calibration ID): 02F300050D 1402 and CAL CVN (Calibration Verification Number): 21DB ?

Could it miscommunicate protocol KWP instead of CAN protocol ?

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<div class="post-metadata">

**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [October 21, 2020, 5:34pm UTC](https://community.cartalk.com/t/2009-volkswagen-jetta-tdi-2-0l-can-kwp200-protocol-question/171438/2 "2020-10-21T17:34:14Z")

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You might also post this on a TDI thread at VWVortex and TheSamba.

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<div class="post-metadata">

**Author:** ![linuxbrk\_171719](https://avatars.discourse-cdn.com/v4/letter/l/ecccb3/32.png) [@linuxbrk\_171719](https://community.cartalk.com/u/linuxbrk_171719)\
**Post date:** [October 21, 2020, 5:36pm UTC](https://community.cartalk.com/t/2009-volkswagen-jetta-tdi-2-0l-can-kwp200-protocol-question/171438/3 "2020-10-21T17:36:00Z")

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Thank you texases. will do.