OBD code P0197 indicates a fault with the Engine Oil Temperature sensor circuit.
Symptoms include the Engine Light being ON.
The issue is commonly caused by a faulty sensor, open/shorted sensor harness, or poor electrical connection.
While not a critical problem, it should be addressed promptly.
To fix, inspect the sensor, wiring harness, and connectors for any damage or poor connections.
Repair Importance Level | 10.0 (Out of 10) |
Estimated Repair Time | Approximately 1.0 hour |
Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the p0197 OBD Code
The vehicle may experience issues related to engine coolant temperature sensor circuit low input.
- Symptoms: Engine Light ON.
- Possible lack of power during acceleration.
- Inconsistent fuel gauge readings.
- Engine may stall or have difficulty starting.
Causes of the p0197 OBD Code
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P0197 code typically indicates an issue with the engine coolant temperature sensor circuit low.
- P0197 can be caused by a faulty Engine Oil Temperature sensor.
- An open or shorted Engine Oil Temperature sensor harness.
- A poor electrical connection in the Engine Oil Temperature sensor circuit.
Fixing Error Code p0197 Step By Step
Address the issue by inspecting the engine oil temperature sensor circuit for potential faults.
- To fix OBDII code P0197, first, review the possible causes related to the engine oil temperature sensor circuit.
- Visually inspect the wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- Replace the engine oil temperature sensor if necessary.
- Clear the fault codes and perform a test drive to verify that the issue has been resolved.
Cost Of Fixing p0197 Fault Code
Diagnosing and repairing fault code P0197 typically involves checking the engine oil temperature sensor circuit.
The cost to diagnose and fix OBD code P0197 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
Costs vary based on labor rates, shop location, and the complexity of the repair needed.
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Details of the p0197 OBD Code
P0197 indicates a low voltage condition in the engine oil temperature sensor circuit.
OBD code P0197 means that the engine oil temperature sensor circuit low input has been detected.
This code is triggered by the Engine Control Module (ECM) when it receives a signal indicating that the engine oil temperature is lower than the specified range.
The sensor involved in this code is the engine oil temperature sensor, which is responsible for providing the ECM with data on the engine oil temperature.
Mechanic’s Tech Notes
Code P0197 indicates a low voltage condition in the engine oil temperature sensor circuit.
OBDII code P0197 indicates a low voltage condition in the engine oil temperature sensor circuit.
To diagnose, use a voltmeter to test the sensor’s voltage supply and ground.
Check for any damaged wiring or connectors.
Scan tools can help monitor sensor data and confirm proper operation.
If the sensor readings are out of range, replacing the sensor may be necessary.
Ensure the sensor is receiving proper voltage and ground for accurate readings.
Be thorough in inspecting the sensor circuit to address the low voltage issue effectively.
FAQ
OBD code P0197 indicates a fault with the Engine Oil Temperature sensor. Check sensor, wiring, and connectors for issues causing the Engine Light to illuminate.
Common symptoms of OBD code P0197 include Engine Light ON, caused by a faulty Engine Oil Temperature sensor or related wiring issues. Inspect and repair as needed.
Diagnose and fix OBD code P0197 by checking the engine oil temperature sensor and its wiring for faults. Inspect connectors for damage or corrosion.

Wrap Up
If your check engine light is on and you’re experiencing fuel temperature sensor issues, you might be dealing with OBDII code P0197. This code typically indicates a problem with the engine coolant temperature sensor circuit low input.
Possible causes include a faulty sensor, damaged wiring, or low coolant levels.
To address OBDII code P0197, start by checking the engine coolant temperature sensor and its wiring harness for any signs of damage or corrosion.
Test the sensor’s resistance and inspect the connector for any loose or bent pins.
Replace the sensor if necessary and ensure all connections are secure.