P1187 Chevrolet Code - Engine Oil Temperature Sensor Circuit Low Voltage
Quick Answer
The P1187 Chevrolet trouble code indicates an issue with the engine oil temperature sensor circuit, specifically that the voltage is too low. Common causes include Faulty Engine Oil Temperature Sensor: The sensor itself may be malfunctioning, causing it to send incorrect voltage readings to the ECM, Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors in the sensor circuit can disrupt the voltage readings, Engine Control Module (ECM) Issues: A problem with the ECM, such as a software glitch or malfunction, can also trigger this code. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1187 Chevrolet indicates Engine Oil Temperature Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Engine Oil Temperature Sensor: The sensor itself may be malfunctioning, causing it to send incorrect voltage readings to the ECM, Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors in the sensor circuit can disrupt the voltage readings, Engine Control Module (ECM) Issues: A problem with the ECM, such as a software glitch or malfunction, can also trigger this code.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1187 Chevrolet Description
The P1187 Chevrolet trouble code indicates an issue with the engine oil temperature sensor circuit, specifically that the voltage is too low. The engine oil temperature sensor is responsible for monitoring the temperature of the engine oil, which is crucial for maintaining the proper functioning of the engine. When the sensor detects that the voltage is too low, it can lead to various performance issues and potentially cause long-term damage if not addressed promptly.
Common Causes of P1187 Chevrolet
- Faulty Engine Oil Temperature Sensor: The sensor itself may be malfunctioning, causing it to send incorrect voltage readings to the ECM.
- Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors in the sensor circuit can disrupt the voltage readings.
- Engine Control Module (ECM) Issues: A problem with the ECM, such as a software glitch or malfunction, can also trigger this code.
- Low Engine Oil Level: Insufficient engine oil can affect the temperature readings and trigger the low voltage code.
- Extreme Temperature Conditions: Extreme cold or hot weather conditions can also impact the sensor's performance and trigger the code.
Symptoms of P1187 Chevrolet
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Engine Performance Issues: The vehicle may experience a decrease in engine performance, such as rough idling, hesitation, or stalling.
- Poor Fuel Economy: A faulty engine oil temperature sensor can lead to poor fuel economy as the engine may not be operating efficiently.
- Overheating: In severe cases, the engine may overheat due to inaccurate readings from the temperature sensor.
How to Fix P1187 Chevrolet
- Diagnostic Testing: Use a diagnostic scanner to retrieve the trouble code and perform testing to identify the specific cause of the low voltage in the engine oil temperature sensor circuit.
- Replace Engine Oil Temperature Sensor: If the sensor is faulty, it will need to be replaced with a new one to restore accurate temperature readings.
- Repair or Replace Wiring/Connectors: Inspect the wiring and connectors in the sensor circuit and repair or replace any damaged components as necessary.
- Check Engine Control Module: Verify the functionality of the engine control module and address any issues that may be causing the low voltage reading.
- Clear Codes and Test: Clear the trouble code from the ECM memory, perform a test drive to ensure the issue is resolved, and recheck for any lingering codes.
Cost to Fix P1187 Chevrolet
The typical repair costs for addressing a P1187 Chevrolet code can vary depending on the specific cause of the issue. In general, replacing the engine oil temperature sensor can range from $100 to $200, while repairing or replacing wiring/connectors may cost around $50 to $100. Labor costs for diagnosing and repairing this issue can range from $100 to $300, depending on the shop's hourly rates and the complexity of the repair. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific vehicle make and model.
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