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P2087 Mercury Code - Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2

Quick Answer

The P2087 diagnostic trouble code (DTC) for Mercury vehicles indicates an issue with the Exhaust Gas Temperature (EGT) sensor circuit for Bank 2 Sensor 2. Common causes include Faulty EGT Sensor: The sensor itself may be malfunctioning, providing incorrect readings to the ECM, Wiring Issues: Corroded, damaged, or loose wiring connections can disrupt the signal between the sensor and the ECM, ECM Malfunction: A malfunctioning ECM can also cause intermittent electrical signals in the EGT sensor circuit. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P2087 Mercury indicates Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2.
Common causes
Common causes include Faulty EGT Sensor: The sensor itself may be malfunctioning, providing incorrect readings to the ECM, Wiring Issues: Corroded, damaged, or loose wiring connections can disrupt the signal between the sensor and the ECM, ECM Malfunction: A malfunctioning ECM can also cause intermittent electrical signals in the EGT sensor circuit.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2087 Mercury Description

The P2087 diagnostic trouble code (DTC) for Mercury vehicles indicates an issue with the Exhaust Gas Temperature (EGT) sensor circuit for Bank 2 Sensor 2. This sensor plays a crucial role in monitoring the temperature of the exhaust gases leaving the engine. Bank 2 refers to the side of the engine that does not contain cylinder number one, while Sensor 2 indicates that it is the downstream sensor located after the catalytic converter.

OBDII Code P2087 Mercury - Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2
P2087 Mercury Code - Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2

Common Causes of P2087 Mercury

  1. Faulty EGT Sensor: The sensor itself may be malfunctioning, providing incorrect readings to the ECM.
  2. Wiring Issues: Corroded, damaged, or loose wiring connections can disrupt the signal between the sensor and the ECM.
  3. ECM Malfunction: A malfunctioning ECM can also cause intermittent electrical signals in the EGT sensor circuit.
  4. Exhaust System Leaks: Leaks in the exhaust system can affect the sensor's readings and trigger this code.
  5. Catalytic Converter Failure: A failing catalytic converter can also impact the EGT sensor's operation.

Symptoms of P2087 Mercury

  1. Check Engine Light: The most common symptom associated with this DTC is the illumination of the Check Engine Light on the dashboard.
  2. Decreased Fuel Efficiency: A faulty EGT sensor can cause the engine to run inefficiently, leading to decreased fuel economy.
  3. Rough Idle: The engine may experience rough idling or inconsistent performance due to incorrect temperature readings from the sensor.
  4. Emission Issues: Increased emissions and the potential for failing emissions tests can also be a symptom of this problem.

How to Fix P2087 Mercury

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the EGT sensor, wiring, and related components.
  2. Replace EGT Sensor: If the sensor is faulty, replace it with a new one compatible with your Mercury vehicle.
  3. Check Wiring: Inspect the wiring harness for any damage or corrosion, repair or replace as needed.
  4. Address Exhaust Leaks: Repair any leaks in the exhaust system that may be affecting the sensor's operation.
  5. Reset ECM: Clear the trouble code from the ECM memory and reset the system to see if the issue has been resolved.

Cost to Fix P2087 Mercury

The cost of repairing a P2087 code for the Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2 can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of a new EGT sensor can range from $50 to $200, while the labor cost for diagnosis and repair can be between $100 to $300. Overall, you can expect to pay anywhere from $150 to $500 for this repair, but it's advisable to get a detailed quote from a trusted auto repair shop in your location to get an accurate estimate. Labor rates can vary between $80 to $150 per hour, so it's essential to consider these factors when budgeting for the repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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