Vehicle Questions and Answers
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The P0198 fault code is frequently found on Hyundai Elantra cars, including the 2005 model year. This error typically indicates a malfunctioning oil temperature sensor. Whether you need to locate this component for troubleshooting or any other reason, I can assist you. In most cases, you will find the sensor in the engine compartment on the engine block or cylinder head. Specifically on the '05 Elantra, it is positioned near the ignition coil and connected to a wiring harness. It is easily accessible, and replacement sensors are affordable. If you choose to replace it yourself, the total cost should be under $50, but it may go up to around $125 if you have a mechanic do it for you.
The 2005 Hyundai Elantra's coolant temperature sensor is situated in the coolant pipe, underneath the air intake pipe, and at the rear of the right cylinder head.