# Service bulletin 122\-Q8P6F\-08

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: 10081183
- Published by NHTSA: 2016\-10\-03
- Manufacturer's number: 122\-Q8P6F\-08
- Manufacturer's date: 2016\-07\-06
- NHTSA component: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:COOLING SYSTEM

## NHTSA's summary

THERE MAY BE A DIFFERENCE BETWEEN THE ACTUAL COOLANT TEMPERATURE AND THE PREDICTED TEMPERATURE DUE TO INCORRECT POSITIONING OF THE MAP\-CONTROLLED THERMOSTAT DURING THE WARM\-UP PHASE ON THE AFFECTED VEHICLES.THE ERROR MESSAGE "FAULT COOLING SYSTEM" WILL THEN BE DISPLAYED IN THE INSTRUMENT CLUSTER AND THE CHECK ENGINE LIGHT WILL COME ON. TO PREVENT THIS FROM HAPPENING, THE DME CONTROL UNIT MUST BE RE\-PROGRAMMED WITH AN UPDATED MAP FOR THE THERMOSTAT.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Electrical system, Engine, Cooling system

## Vehicles listed

- 2017 PORSCHE 911

## Other bulletins for the same vehicles and component

- [No. 72\-17](/bulletins/10186302.md), 2021-02-01, Service bulletin: EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. Instructions for reworking the fan motor in the event that the HVAC does not function.
- [122\-T8X6Q\-09](/bulletins/10081380.md), 2016-10-04, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:COOLING SYSTEM. "THERE MAY BE A DIFFERENCE BETWEEN THE ACTUAL COOLANT TEMPERATURE AND THE PREDICTED TEMPERATURE DUE TO INCORRECT POSITIONING OF THEMAP\-CONTROLLED THERMOSTAT DURING THE WARM\-UP PHASE ON THE AFFECTED VEHICLES. THE ERROR MESSAGE ""FAULT COOLING SYSTEM"" WILL THEN BE DISPLAYED IN THE INSTRUMENT CLUSTER AND THE CHECK ENGINE LIGHT WILL COME ON."
- [122\-N8E4F\-08](/bulletins/10081182.md), 2016-10-03, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM; ELECTRICAL SYSTEM. "THERE MAY BE A DIFFERENCE BETWEEN THE ACTUAL COOLANT TEMPERATURE AND THE PREDICTED TEMPERATURE DUE TO INCORRECT POSITIONING OF THE MAP\-CONTROLLED THERMOSTAT DURING THE WARM\-UP PHASE ON THE AFFECTED VEHICLES.THE ERROR MESSAGE ""FAULT COOLING SYSTEM"" WILL THEN BE DISPLAYED IN THE INSTRUMENT CLUSTER AND THE CHECK ENGINE LIGHT WILL COME ON. TO PREVENT THIS FROM HAPPENING, THE DME CONTROL UNIT MUST BE RE\-PROGRAMMED WITH AN UPDATED MAP FOR THE THERMOSTAT."

JSON: [/v1/bulletins/10081183](/v1/bulletins/10081183)

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