P2087 Code: Complete DIY Repair Guide

The P2087 trouble code is a diagnostic trouble code (DTC) that signifies an issue with the Exhaust Gas Temperature (EGT) sensor circuit, specifically indicating an intermittent fault in Bank 2 Sensor 2. This code is part of the OBD-II system and is applicable to a wide range of vehicles manufactured from 1996 onward. Understanding this code is essential for vehicle owners and DIY mechanics, as it can lead to decreased engine performance and increased emissions if not addressed promptly.

Symptoms of P2087 Code

When the P2087 code is triggered, vehicle owners may notice several symptoms, including:

• Check Engine Light: The most common indicator is the illumination of the check engine light on the dashboard.
• Decreased Engine Performance: Drivers may experience a noticeable drop in engine power and responsiveness.
• Increased Emissions: The vehicle may emit higher levels of pollutants, which could lead to failed emissions tests.

Technical Explanation

The P2087 code indicates that the EGT sensor located in Bank 2 (which does not contain cylinder #1) is experiencing an intermittent fault. This sensor plays a critical role in monitoring exhaust temperatures to protect components such as the catalytic converter from damage due to excessive heat. The EGT sensor converts temperature readings into voltage signals that are sent to the PCM, which adjusts engine parameters accordingly.

When the PCM detects that the signal from the EGT sensor is outside factory specifications—either too low or intermittent—it triggers the P2087 code. This can occur due to various factors, including sensor failure, wiring issues, or problems with related components like the DPF.

Step-by-Step Diagnosis

Diagnosing a P2087 code involves several systematic steps:

1. Initial Inspection: Begin by visually inspecting the EGT sensor and its wiring harness for any signs of damage, corrosion, or loose connections.
2. Check Sensor Resistance: Disconnect the EGT sensor and use an ohmmeter to measure its resistance. A properly functioning EGT sensor should have a resistance reading within specified limits (typically around 150 ohms).
3. Voltage Testing: With the ignition on (engine off), measure voltage at the connector for the EGT sensor. You should see approximately 5 volts. If not, further investigation into the PCM may be necessary.
4. Sensor Heating Test: Apply heat to the sensor using a heat gun while monitoring resistance with an ohmmeter. The resistance should decrease as temperature increases; if it does not, replace the sensor.
5. Inspect Related Components: Check other components like the DPF and catalytic converter for proper operation, as failures here can also trigger P2087.

Solution Methods

Resolving a P2087 trouble code typically involves one or more of the following actions:

• Replace Faulty EGT Sensor: If testing confirms that the EGT sensor is defective, replacing it will often resolve the issue.
• Repair Wiring Issues: Address any wiring faults such as shorts or opens in the circuit leading to and from the EGT sensor.
• Fix Electrical Connections: Ensure all connectors are secure and free from corrosion; repair or replace any damaged connectors.
• Clean Excessive Build-Up: If there is significant particulate matter build-up on or around the EGT sensor, cleaning it may restore proper function.
• Check PCM Functionality: In rare cases, if all other components are functioning correctly but issues persist, consider having the PCM tested for faults.

Cost Estimates

The cost to diagnose and repair a P2087 code can vary widely based on location and vehicle make/model:

• Diagnostic Fees: Expect to pay between $75 and $150 per hour for diagnostic services at a repair shop.
• Sensor Replacement: The cost of an EGT sensor can range from $50 to $200 depending on your vehicle’s specifications.
• Wiring Repairs: Costs can vary significantly based on labor rates and parts needed but generally fall within $100 to $300 for wiring repairs.
• Total Repair Costs: Overall repairs could range from $150 for simple fixes to over $500 if multiple components need replacement or extensive labor is required.

Warnings and Recommendations

• Always ensure that you have disconnected your vehicle’s battery before working on electrical components to avoid short circuits or shocks.
• If you are unsure about diagnosing or repairing your vehicle, consider seeking professional help. Some issues related to emissions systems can be complex and require specialized knowledge.
• Regular maintenance of exhaust systems can prevent issues like those indicated by a P2087 code. Ensure that your vehicle’s exhaust system is free from leaks and blockages.

Frequently Asked Questions About P2087

• What does error code P2087 mean?
  The P2087 code indicates an intermittent fault in the Exhaust Gas Temperature Sensor circuit for Bank 2 Sensor 2.
• How serious is a P2087 code?
  This code can lead to decreased engine performance and increased emissions; it should be addressed promptly.
• Can I drive my car with a P2087 code?
  While it may be drivable, it’s advisable to repair it soon to avoid further damage.
• What are common causes of P2087?
  Common causes include faulty EGT sensors, wiring issues, poor electrical connections, and excessive particulate build-up.
• How do I fix a P2087 code?
  Fixing it typically involves replacing faulty sensors, repairing wiring issues, or cleaning excessive build-up.
• Will clearing codes fix my car?
  No, simply clearing codes without addressing underlying issues will likely result in reoccurrence.
• How much does it cost to fix a P2087 code?
  The total repair costs can range from $150 to over $500 depending on parts and labor needed.
• Is professional help necessary for a P2087 code?
  If you’re unsure about diagnosing or repairing your vehicle, it’s best to consult with a professional mechanic.

In conclusion, understanding and addressing the P2087 trouble code is crucial for maintaining optimal vehicle performance and ensuring compliance with emissions regulations. By following proper diagnostic procedures and addressing any identified issues promptly, vehicle owners can mitigate potential risks associated with this trouble code. Regular maintenance and vigilance can prevent many common problems related to exhaust gas temperature sensors.