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Engine-Codes – Generic – P1087

P1087 Code - O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1

Quick Answer

The diagnostic trouble code (DTC) P1087 indicates that there is a slow response from the oxygen sensor in Bank 1, Sensor 1, specifically in the lean control range. Common causes include Faulty oxygen sensor, Vacuum leak, Exhaust system leaks. 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
P1087 indicates O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1.
Common causes
Common causes include Faulty oxygen sensor, Vacuum leak, Exhaust system leaks.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1087 Description

The diagnostic trouble code (DTC) P1087 indicates that there is a slow response from the oxygen sensor in Bank 1, Sensor 1, specifically in the lean control range. The oxygen sensor is a crucial component in the vehicle's emissions system as it measures the oxygen content in the exhaust gases to help the engine control module (ECM) adjust the air-fuel mixture for optimal combustion. A slow response from the oxygen sensor in the lean control range can lead to issues with fuel efficiency, emissions, and overall engine performance. If left unresolved, it can potentially cause damage to the catalytic converter and other engine components.

OBDII Code P1087 - O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1
P1087 Code - O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1

Common Causes of P1087

  1. Faulty oxygen sensor
  2. Vacuum leak
  3. Exhaust system leaks
  4. Wiring or connector issues
  5. ECM software or hardware problems

Symptoms of P1087

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Poor acceleration
  4. Increased emissions
  5. Check Engine Light illuminated

How to Fix P1087

  1. Diagnose the issue using a scan tool to verify the code and check for any other related codes.
  2. Inspect the oxygen sensor and its wiring for any damage or corrosion. Replace if necessary.
  3. Check for vacuum leaks or exhaust system leaks and repair as needed.
  4. Clear the DTC and reset the ECM to see if the code returns.
  5. Test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1087

The cost of repairing a P1087 code can vary depending on the specific cause of the issue. In general, replacing an oxygen sensor can cost between $100 to $300 for the part, with additional labor costs ranging from $50 to $150 per hour. If the problem is related to wiring or other components, the cost may increase. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of your vehicle.

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Code P1087 Information for Specific Makes

  • P1087 Audi — Exhaust Bank 4- Mixture Adaption Range 1 Lower Rich Limit Not Reached
  • P1087 BMW — O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1
  • P1087 Infiniti — VVEL Small Event Angle Malfunction Bank 1
  • P1087 MINI — O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1
  • P1087 Nissan — VVEL Small Event Angle Malfunction Bank 1
  • P1087 Subaru — Tumble Generated Valve Position Circuit High Sensor 2
  • P1087 Volkswagen — Exhaust Bank 4- Mixture Adaption Range 1 Lower Rich Limit Not Reached
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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