Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the oxygen sensor behind the engine on the passenger side is seeing too much fuel in the exhaust.
The P2273 code indicates that the oxygen sensor on bank 2, sensor 2 is reporting a rich condition, meaning there is too much fuel and not enough air in the exhaust.
The P2273 code is triggered when the powertrain control module (PCM) detects that the downstream oxygen sensor on bank 2 is indicating a rich condition for an extended period. This sensor is responsible for monitoring the efficiency of the catalytic converter by measuring the amount of oxygen in the exhaust gases after they pass through the converter. A 'rich' condition means there is less oxygen and more fuel in the exhaust than expected.
• Check Engine Light is on
• Poor fuel economy
• Rough idle
• Increased emissions
• Faulty oxygen sensor
• Exhaust leaks
• Fuel injector issues
• Faulty catalytic converter
• Wiring problems
PCM: Powertrain Control Module, the computer responsible for engine and transmission management.
Oxygen Sensor: A device that measures the amount of oxygen in the exhaust gases.
• Scan for codes and freeze frame data
• Inspect oxygen sensor and wiring for damage
• Check for exhaust leaks
• Test the oxygen sensor with a multimeter
• Replace the faulty oxygen sensor
• Repair any exhaust leaks
• Replace or clean fuel injectors
• Repair or replace damaged wiring
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regular maintenance checks
• Use high-quality fuel
• Inspect exhaust system periodically
Sensor Issue
• Avoid driving with the Check Engine Light on for extended periods
• Have the vehicle inspected by a professional if unsure
Check with the vehicle manufacturer for specific warranty coverage related to emissions components.
This code has been commonly associated with vehicles that have high mileage or have not had regular maintenance, particularly in the exhaust system.
Moderate – Addressing this issue soon can prevent further damage and maintain fuel efficiency.
Ignoring emissions-related codes can lead to increased pollution and potential legal issues in areas with strict emissions testing.
• Engine at operating temperature
• Vehicle running at idle
The oxygen sensor for bank 2, sensor 2 is located downstream of the catalytic converter on the side of the engine opposite cylinder 1.
Q: Can I drive with a P2273 code?
A: It's possible to drive, but it's not recommended as it may lead to poor fuel economy and increased emissions.
Q: How can I prevent a P2273 code?
A: Regular vehicle maintenance and using quality fuel can help prevent this code.
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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.