# Service bulletin Bulletin 80C9

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: 10180345
- Published by NHTSA: 2020\-10\-06
- Manufacturer's number: Bulletin 80C9
- Manufacturer's date: 2020\-09\-24
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Affected vehicles software configuration for monitoring a functional temperature sensor and coolant switching valve was based on known good and 'bad' temperature differentials. The 'bad' temperature differentials did not take into account certain normal variables. This condition could lead to a MIL with the following erroneous faults stored in the thermal management control module \(00C5\): P0C4300: Hybrid/EV Battery Pack Coolant Temperature Sensor "A" Circuit Range/Performance P0CE100: Hybrid/EV Battery Pack Coolant Control Valve "A" Stuck On

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180345-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180345-9999.pdf)

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

## Components

Engine

## Trouble codes named

P0C43, P0CE1

## Vehicles listed

- 2020 AUDI Q5
- 2020 AUDI Q5 E

## Other bulletins for the same vehicles and component

- [TSB\_2083393\_1](/bulletins/11038129.md), 2026-10-05, Service bulletin: ENGINE. This bulletin provides information when the starter/generator drive belt is noisy or came off.
- [TSB\_2082323\_1](/bulletins/11034728.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides informaiton when the engine is not running smoothly, misfiring.
- [TSB\_2074640\_3](/bulletins/11034657.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides information when there is increased oil consumption; \>0.5ltr/1000 km.
- [TSB\_2073867\_3](/bulletins/11034656.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides information when DTC U140A00 Terminal 30 is stored in the ECM.
- [TSB\_2051095\_10](/bulletins/11029368.md), 2026-03-03, Service bulletin: ENGINE. This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
- [TSB\_2021205\_10](/bulletins/11029367.md), 2026-03-03, Service bulletin: ENGINE. This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
- [TSB\_2060750\_5](/bulletins/11028398.md), 2026-02-06, Service bulletin: ENGINE. This bulletin provides information regarding UV leak additive for finding oil leaks.
- [TSB\_2080494\_1](/bulletins/11027439.md), 2026-01-07, Service bulletin: ENGINE. This bulletin provides service information when there is dirt or a small amount of oil residue on the engine mounting.
- [TSB\_2074640\_2](/bulletins/11027356.md), 2026-01-07, Service bulletin: ENGINE. This bulletin provides information when there is increased oil consumption; \>0.5ltr/1000 km.
- [TSB\_2061461\_15](/bulletins/11026211.md), 2025-12-05, Service bulletin: ENGINE. This bulletin provides information when the starter/generator drive belt is noisy or came off; 2.0 ltr. Inline 4\-cyl. TFSI.

JSON: [/v1/bulletins/10180345](/v1/bulletins/10180345)

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