# Service bulletin A451206 2031989\-

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10122679
- Published by NHTSA: 2017\-11\-08
- Manufacturer's number: A451206 2031989\-
- Manufacturer's date: 2012\-12\-05
- NHTSA component: EXTERIOR LIGHTING:BRAKE LIGHTS; EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH

## NHTSA's summary

After replacing the ABS control unit, the new control unit stores DTC 01044 \(Control Unit Incorrectly Coded\). No warning light is on and the brake electronics work correctly. Due to a supersession of parts, only ABS/ESP hydraulic control units prepared for vehicles equipped with the start\-stop feature are supplied as replacement parts. Once installed, the new unit stores DTC 01044 \(Control Unit Incorrectly Coded\) because it does not receive a response on the data bus when checking for the start\-stop feature. The missing response results in the DTC entry. Within the scenario described in the Condition section of this TSB, the missing start\-stop response is the only reason for this DTC. In all other respects the coding of the ABS/ESP control unit matches the vehicle data. The entry does not affect the function of the brake electronics and no warning appears in the instrument cluster. There are no effects on performance or safety.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2012/MC-10122679-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2012/MC-10122679-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Lighting, Brake lights

## Vehicles listed

- 2009 to 2010 AUDI A4
- 2008 to 2010 AUDI A5
- 2010 AUDI A5 CABRIOLET

## Other bulletins for the same vehicles and component

- [TSB\-94\-11\-56](/bulletins/10042993.md), 2012-02-07, Service bulletin: EXTERIOR LIGHTING:BRAKE LIGHTS. AUDI: ON CERTAIN MODEL YEAR 2008 TO 2013 VEHICLES, DURING ADJUSTMENT OR REMOVAL, BRAKE LIGHT SENSORS BEING REPLACED ARE DAMAGED, PREVENTING PROPER ANALYSIS. \*PE
- [2012749\-2](/bulletins/10025703.md), 2008-09-03, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS:CONCEALMENT DEVICES; EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS; EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING:BACK UP LIGHTS; EXTERIOR LIGHTING:FOG LIGHTS; EXTERIOR LIGHTING:TAIL LIGHTS; EXTERIOR LIGHTING:BRAKE LIGHTS. EXTERIOR LIGHTS, MOSITURE ACCUMULATION. \*PE

JSON: [/v1/bulletins/10122679](/v1/bulletins/10122679)

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