Subaru Code P0198 is an engine fault code that indicates a problem with the engine oil temperature sensor circuit. According to the manufacturer, the code can cause engine stalls, erroneous idling, and poor driving performance. To identify the root cause, it is important to check the harness between the sensor and the ECM. This Subaru Code P0198 article will delve into the causes and solutions of this engine fault code.
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Causes and Solutions of Subaru Code P0198
| Causes | Solutions |
|---|---|
| Faulty wiring in the sensor | Check wiring and replace if necessary |
| Defective ECM | Replace ECM |
| Clogged oil filter | Replace clogged filter |
| Faulty oil temperature sensor | Replace faulty sensor |
Faulty Wiring in the Sensor
The first cause of Subaru Code P0198 is faulty wiring in the sensor. The wiring of the engine oil temperature sensor is fragile and can easily break. If the wiring is cracked, the engine will not receive the correct signal from the sensor, triggering the code. To identify the root cause, it is important to check the harness between the sensor and the ECM. If it is found that the wiring is indeed faulty, it is important to replace the wiring to ensure proper functioning.
Defective ECM
Another potential cause of Subaru Code P0198 is a defective ECM. The ECM, or Electronic Control Module, is responsible for the engine’s proper functioning. If the ECM is faulty, it can cause the code to be triggered. If a defective ECM is found, replacing it with a new one is important.
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Clogged Oil Filter
The third cause of Subaru Code P0198 is a clogged oil filter. The oil filter filters out dirt, debris, and other contaminants from the engine oil. If the filter is clogged, it can cause the code to be triggered. To identify the root cause, it is important to check the oil filter for any signs of clogging. If the filter is found to be clogged, it is important to replace it with a new one.
Faulty Oil Temperature Sensor
The last cause of Subaru Code P0198 is a faulty oil temperature sensor. The oil temperature sensor provides the engine with accurate oil temperature readings. If the sensor is defective, it can cause the code to be triggered. To identify the root cause, it is important to check the sensor for any signs of damage. If the sensor is found to be faulty, replacing it with a new one is important.
Conclusion
In conclusion, Subaru Code P0198 is an engine fault code that indicates a problem with the engine oil temperature sensor circuit. The causes of this code can range from faulty wiring in the sensor, a defective ECM, a clogged oil filter, or a faulty oil temperature sensor. To identify the root cause, it is important to check the wiring and components for any signs of damage. If any of these components are found to be faulty, it is important to replace them to ensure proper functioning. Subaru owners can quickly and easily diagnose and repair any issues related to the Subaru Code P0198 by taking the necessary steps.
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