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EFI AUTOMOTIVE SERVICE

Exhaust gas temperature sensors

Exhaust gas temperature sensors

EFI AUTOMOTIVE SERVICE

Description

Located along the exhaust line (as its name implies), the temperature sensor measures the exhaust gases’ temperature in order to limit pollutant emission. This information is transmitted directly (via a voltage signal) to the electronic control module (ECM) in order to optimize combustion – to make it as clean as possible, either by adapting the air/fuel mixture, or by initiating a regeneration of the diesel particulate filter (DPF).

Originally protecting only the catalytic converter, in the exhaust system, the exhaust gas temperature sensor’s role is pivotal. As a matter of fact, it also protects the components in the exhaust gas stream, which are exposed to extremely high temperatures. The sensor is capable of measuring temperatures ranging from -40 to +900°C and its presence in a particularly harsh environment exposes it to a high risk of failure (compared to other sensors).

Due to increasingly strict anti-pollution standards, modern vehicles (petrol and diesel engines) are equipped with several sensors. Generally, they have at least 3 sensors, one before the turbocharger, one before the DPF and one after the DPF.

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