P1189 – OBD-II DTC

OBD-II DTC P1189 – Engine Oil Temperature Out Of Self Test Range

DTC P1189 meaning

DTC P1189 refers to an issue with the engine oil temperature sensor, indicating that the temperature reading is out of the self-test range. This code is generated when the Engine Control Module (ECM) detects that the oil temperature sensor is providing readings that are not within the expected parameters during a self-test. The oil temperature is crucial for optimal engine performance and lubrication.

DTC P1189 symptoms

Common symptoms associated with DTC P1189 may include:

• Check Engine Light illuminated
• Increased engine oil temperature readings
• Engine performance issues
• Poor fuel economy
• Potential overheating of the engine

DTC P1189 causes

Several factors can lead to the triggering of DTC P1189, including:

• Faulty engine oil temperature sensor
• Wiring issues or poor connections in the sensor circuit
• Faulty Engine Control Module (ECM)
• Oil contamination or incorrect oil type
• Mechanical issues within the engine affecting oil flow

DTC P1189 seriousness

DTC P1189 can be serious as it may indicate that the engine is not receiving proper lubrication due to incorrect oil temperature readings. If left unaddressed, this can lead to:

• Increased wear and tear on engine components
• Potential engine overheating
• Severe engine damage

How to diagnose DTC P1189

To diagnose DTC P1189, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the engine oil temperature sensor and its wiring for damage or corrosion.
4. Test the resistance of the oil temperature sensor to ensure it is within specifications.
5. Check the engine oil level and condition to rule out contamination.
6. Monitor the oil temperature readings with a scan tool while the engine is running.

How to fix DTC P1189 step-by-step instructions

To fix DTC P1189, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the oil temperature sensor.
2. Replace the engine oil temperature sensor if it is found to be faulty.
3. Change the engine oil if it is contaminated or incorrect.
4. Clear the DTC using an OBD-II scanner.
5. Test drive the vehicle to ensure the code does not return.

How to erase DTC P1189

To erase DTC P1189, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

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