Engine-Codes.com
Engine-Codes – Mercury – P2086 Mercury

P2086 Mercury Code - Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2

Quick Answer

The P2086 diagnostic trouble code (DTC) for Mercury vehicles refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit for Bank 2 Sensor 2. Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, providing incorrect data to the ECM, Damaged Wiring or Connectors: Wiring or connectors related to the EGT sensor circuit may be damaged, leading to poor connectivity, Exhaust Leaks: Leaks in the exhaust system can affect the EGT sensor's readings, triggering the P2086 code. 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
P2086 Mercury indicates Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2.
Common causes
Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, providing incorrect data to the ECM, Damaged Wiring or Connectors: Wiring or connectors related to the EGT sensor circuit may be damaged, leading to poor connectivity, Exhaust Leaks: Leaks in the exhaust system can affect the EGT sensor's readings, triggering the P2086 code.
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P2086 Mercury Description

The P2086 diagnostic trouble code (DTC) for Mercury vehicles refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit for Bank 2 Sensor 2. This sensor is responsible for monitoring the exhaust gas temperature in the second bank of cylinders in the engine. The EGT sensor plays a crucial role in regulating the engine's performance and emissions by providing data to the engine control module (ECM) to adjust fuel delivery and timing.

OBDII Code P2086 Mercury - Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2
P2086 Mercury Code - Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2

Common Causes of P2086 Mercury

  1. Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, providing incorrect data to the ECM.
  2. Damaged Wiring or Connectors: Wiring or connectors related to the EGT sensor circuit may be damaged, leading to poor connectivity.
  3. Exhaust Leaks: Leaks in the exhaust system can affect the EGT sensor's readings, triggering the P2086 code.
  4. ECM Issues: Problems with the engine control module (ECM) can also cause errors in the EGT sensor circuit.

Symptoms of P2086 Mercury

  1. Check Engine Light: The most common symptom associated with the P2086 code is the illumination of the check engine light on the dashboard.
  2. Decreased Fuel Efficiency: A malfunctioning EGT sensor can lead to inefficient fuel delivery, resulting in decreased fuel efficiency.
  3. Rough Idling: The engine may experience rough idling or hesitation when the EGT sensor is not functioning correctly.
  4. Reduced Engine Performance: The vehicle may exhibit a lack of power or acceleration due to incorrect data from the EGT sensor.
  5. Increased Emissions: A faulty EGT sensor can lead to higher emissions output, potentially causing the vehicle to fail emissions tests.

How to Fix P2086 Mercury

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the exact cause of the problem.
  2. Inspect EGT Sensor: Check the EGT sensor for any visible damage or signs of malfunction.
  3. Check Wiring and Connectors: Inspect the wiring and connectors associated with the EGT sensor circuit for any damage or corrosion.
  4. Repair or Replace Components: Repair or replace any faulty components, such as the EGT sensor, wiring, connectors, or ECM, as needed.
  5. Clear Codes and Test Drive: Once the repair is complete, clear the codes from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2086 Mercury

The typical repair costs for addressing the P2086 code on a Mercury vehicle can range from $200 to $500, including parts and labor. However, the actual cost can vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing. It is advisable to obtain quotes from multiple repair shops to find the best deal for resolving this issue.

Need more information about the P2086 Mercury code?

Need more information on how to fix the P2086 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2086 Mercury code diagnosed by a professional: Find a repair shop in your area

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.

Frequently Asked Questions about P2086 Mercury Code

No Frequently Asked Questions about P2086 Mercury Code found.

Discuss the causes and fixes for P2086 Mercury OBDII Code

Submit a New Comment

Code P2086 Mercury comments

No comments found for this page.