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 thinks one of the sensors that checks how clean the exhaust is might be broken or reading too much fuel.
The P11ED code indicates that the oxygen sensor on Bank 2, Sensor 2, is reporting a rich condition, meaning there's too much fuel in the exhaust gases.
This code is triggered when the oxygen sensor located downstream on Bank 2 (the side of the engine with cylinder 2) detects a consistently rich air-fuel mixture. This could mean the sensor is faulty or the engine is actually running rich due to other issues.
• Check Engine Light is on
• Increased fuel consumption
• Rough engine idle
• Faulty oxygen sensor
• Fuel injector leak
• Exhaust leak
Oxygen Sensor: A device that measures the oxygen level in the exhaust gases.
Rich Condition: When there is too much fuel and not enough air in the engine's air-fuel mixture.
• Use an OBD-II scanner to confirm the code
• Inspect the oxygen sensor and wiring for damage
• Check for exhaust leaks
• Replace the faulty oxygen sensor
• Repair any exhaust leaks
• Check and replace faulty fuel injectors
• OBD-II scanner
• Wrench set
• Multimeter
$150 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect oxygen sensors
• Maintain proper engine tuning
• Check for exhaust leaks periodically
Sensor Issue
• Address the issue promptly to avoid further damage
• Consult a professional mechanic if unsure
Oxygen sensors may be covered under the vehicle's emissions warranty.
This code has been more common in vehicles with higher mileage due to sensor wear.
Moderate – Should be addressed soon to prevent further engine issues.
Driving with a faulty oxygen sensor can lead to increased emissions and may not pass emissions testing.
• Engine at operating temperature
• Vehicle in closed loop mode
Bank 2 Sensor 2 is located downstream in the exhaust system, after the catalytic converter on the side of the engine with cylinder 2.
Q: Can I drive with a P11ED code?
A: It's possible to drive for a short period, but it's recommended to fix it soon to avoid further issues.
Q: How do I know if my oxygen sensor is bad?
A: Symptoms include poor fuel economy, rough idle, and the Check Engine Light being on.
Budget · Enhanced code reader
A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.
Good for emissions-related codes because it exposes readiness monitors and live powertrain data.
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Specialty · Smoke machine
Helpful for finding EVAP and vacuum leaks that are hard to see with visual inspection alone.
Helpful for tracking down EVAP and vacuum leaks that can trigger emissions faults.
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Specialty · O2 sensor socket
Helpful when the code points toward exhaust or oxygen-sensor work and space is tight.
Useful when the diagnosis points toward oxygen-sensor removal or replacement.
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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.