Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble getting a quick response from a sensor that checks how much oxygen is in the exhaust. This sensor helps the car use the right amount of fuel, and it's not working fast enough.
The oxygen sensor in the exhaust system isn't responding quickly enough to changes in the air-fuel mixture, affecting the engine's ability to maintain optimal performance.
The P1087 code indicates that the oxygen sensor located on Bank 1, Sensor 1 is not responding quickly to changes in the air-fuel mixture when in the lean control range. This slow response can affect the engine's efficiency and emissions.
• Check Engine Light is on
• Poor fuel economy
• Rough idling or hesitation during acceleration
• Faulty oxygen sensor
• Wiring issues or poor connections in the sensor circuit
• Exhaust leaks near the sensor
Oxygen Sensor: A device that measures the amount of oxygen in the exhaust gases.
Lean Control Range: A condition where the air-fuel mixture has more air than fuel.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the oxygen sensor's response time using a multimeter.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks near the sensor.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain the exhaust system.
• Ensure timely replacement of oxygen sensors as per vehicle maintenance schedule.
• Avoid driving with a known exhaust leak.
Sensor Issue
• Address the issue promptly to avoid further engine performance problems.
• Consult a professional mechanic if unsure about the repair process.
Check if the oxygen sensor is covered under the vehicle's emissions warranty.
Oxygen sensor issues have been common as vehicles age, often due to sensor wear or exhaust leaks.
Moderate – Should be addressed soon to prevent potential damage to the catalytic converter.
Driving with a faulty oxygen sensor can lead to increased emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle in closed-loop operation
The oxygen sensor is located in the exhaust manifold or exhaust pipe before the catalytic converter on Bank 1.
Q: Can I drive with a P1087 code?
A: You can drive for a short period, but it's best to fix the issue soon to avoid further engine problems.
Q: How often should oxygen sensors be replaced?
A: Typically, oxygen sensors should be replaced every 60,000 to 100,000 miles, depending on the vehicle and sensor type.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when the code or supporting diagnostics point toward upstream or downstream oxygen-sensor faults.
This code family often involves upstream or downstream oxygen-sensor diagnosis.
Verify exact sensor position and vehicle fitment before buying.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.