Walker Exhaust Gas Temp Sensor For Jeep Grand Cherokee Wk ETS1222
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The Exhaust Gas Temperature Sensor (EGTS), also commonly referred to as Exhaust Temperature Sensor (ETS) or High Temperature Sensor (HTS), measures temperature in the exhaust system (EGT) of the vehicle. The sensing element of an ETS/HTS changes in resistance with changes in temperature. The onboard computer, or ECU or PCM, then measures this resistance and calculates the actual temperature of the exhaust. This function protects the engine and exhaust components from overheating. EGT sensors are generally found on later model diesel vehicles and are used to protect the Diesel Particulate Filter (DPF) and ensure proper function of the DPF regeneration process. Some late model gasoline cars are now utilizing EGT sensor technologies to further fine tune fuel and ignition timing by carefully measuring exhaust gas temperatures as a relation to air/fuel ratios.