# Service bulletin No. 2121.2

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: 11005768
- Published by NHTSA: 2024\-08\-06
- Manufacturer's number: No. 2121.2
- Manufacturer's date: 2024\-07\-17
- NHTSA component: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; ELECTRICAL SYSTEM

## NHTSA's summary

Instructions on advanced technical information for the Cayenne \- dynamic calibration fault C110300

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11005768-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11005768-9999.pdf)

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

## Components

Driver assistance, Electrical system, Adaptive cruise control

## Trouble codes named

C1103

## Vehicles listed

- 2019 to 2023 PORSCHE CAYENNE
- 2019 to 2023 PORSCHE CAYENNE E\-HYBRID
- 2020 to 2022 PORSCHE CAYENNE GT
- 2021 to 2023 PORSCHE CAYENNE GTS
- 2019 to 2023 PORSCHE CAYENNE S
- 2020 PORSCHE CAYENNE S E\-HYBRID
- 2019 to 2020 PORSCHE CAYENNE TURBO
- 2023 PORSCHE CAYENNE TURBO
- 2020 PORSCHE CAYENNE TURBO COUPE
- 2022 to 2023 PORSCHE CAYENNE TURBO GT
- 2019 to 2023 PORSCHE CAYENNE TURBO S E\-HYBRID
- 2020 PORSCHE CAYENNE TURBO S HYB COUPE
- 2020 PORSCHE redundant CAYENNE E\-HYBRID

## Other bulletins for the same vehicles and component

- [No. 11\-25\-4](/bulletins/11037046.md), 2026-09-04, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. Technical Information for White Messages Regarding Driver Assistance Systems in Conjunction with Passive Fault Memory Entries in the ZFAS Control Unit
- [2121.4](/bulletins/11035741.md), 2026-08-05, Service bulletin: VEHICLE SPEED CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. ACC Dynamic Calibration Fault C110300
- [No. 11\-25](/bulletins/11027134.md), 2026-01-06, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: WARNINGS. Technical information for Various Error Messages Regarding Driver Assistance Systems in the Instrument Cluster in Conjunction With Passive Fault Memory Entries in the Driver Assistance Systems Control Unit \- ZFAS
- [No. 2121.3](/bulletins/11021356.md), 2025-08-04, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Instructions on advanced technical information for the Cayenne \- ACC Dynamic Calibration Fault C110300

JSON: [/v1/bulletins/11005768](/v1/bulletins/11005768)

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