U0147: Perda de comunicação com o gateway B de dados seriais
O que fazer
Expect the connected features to stop — the phone app, live traffic, online services, hands-free calling — while the car itself drives normally.
That combination is deliberate. On many modern cars this second gateway is a barrier between the parts of the car that can be reached from outside — telematics, keyless entry, phone and media — and the parts that steer, brake and drive it. When it stops passing messages, the connected features go and the car keeps working. That is the design doing its job.
One thing worth treating as more than an inconvenience: the automatic emergency call may have gone with it. On many cars that system sits behind this gateway, and there is no symptom at all to tell you — see U0198.
And the question that usually finds the fault is what has been added rather than what has broken. A tracker, insurance box, dashcam, or plug-in dongle gets wired in exactly here, because it is where the useful data crosses. Mention anything of that kind, including anything a previous owner had fitted — a poor installation is a common cause of both this fault and a battery that goes flat over a weekend.
O que este código significa
A second gateway module has stopped being heard from. See U0146 for what a silent gateway does to everything behind it, and U0448 for why a vehicle carries more than one — increasingly as a deliberate security boundary between the modules that can be reached from outside the vehicle and the ones that steer, brake and drive it.
That boundary explains the symptom pattern, and it is a good outcome rather than a bad one. A silent gateway on the outward-facing side takes out connected services, the phone app, live traffic and hands-free calling while the vehicle drives entirely normally — which is exactly what the separation was built to achieve.
Two things are worth raising anyway.
The emergency call may have gone with it. On many vehicles the telematics module sits behind this gateway, so the automatic post-crash call is unavailable and nothing about driving says so — see U0198.
And this is the gateway an aftermarket device is most often spliced into, because it is where the useful data crosses. A tracker, insurance box, dashcam or fleet terminal wired in here is a common cause of both this code and a battery that flattens over a weekend, since a device that keeps reading the network stops the vehicle sleeping.
So the question that finds it is what has been added rather than what has broken, and it should be asked about work a previous owner had done as well.
Causas prováveis
Comece aqui
- Emenda de fiação malfeita em instalação de terceiros · moderado
- Fusível queimado ou alimentação inoperante · fácil
- Conector corroído ou frouxo · fácil
- Alimentação ou massa do módulo inoperante · moderado
Menos comum
- Fiação do barramento de dados danificada · moderado
- Módulo gateway com defeito · especializado
Sintomas
Componentes envolvidos
Informação, não instrução
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Experiência da comunidade
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O que faz valer a leitura:
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- O que você mediu, não só o que trocou.
- O que realmente resolveu — ou que nada resolveu, o que também vale saber.
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