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 there's too much fuel in the exhaust after it has passed through the catalytic converter on one side of the engine.
The oxygen sensor after the catalytic converter on Bank 2 is detecting too much fuel in the exhaust gases, indicating a rich condition.
OBD-II code P114C indicates that the post-catalytic converter oxygen sensor on Bank 2 has detected a fuel mixture that is too rich. This means there is an excess amount of fuel compared to air in the exhaust gases after they have passed through the catalytic converter.
• Check Engine Light is on
• Poor fuel economy
• Rough idle
• Faulty oxygen sensor
• Leaking fuel injector
• Faulty fuel pressure regulator
Oxygen Sensor: A device that measures the oxygen level in the exhaust gases.
Catalytic Converter: A component that reduces harmful emissions from the exhaust.
• Use an OBD-II scanner to confirm the code.
• Inspect the oxygen sensor and its wiring for damage.
• Check for fuel leaks or faulty injectors.
• Replace the faulty oxygen sensor.
• Repair or replace leaking fuel injectors.
• Check and replace the fuel pressure regulator if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• BMW 3 Series
• Ford F-150
• Chevrolet Silverado
• Regular maintenance and inspection of the fuel system.
• Replace oxygen sensors at recommended intervals.
• Use quality fuel to prevent deposits.
Engine Performance
• Have the vehicle inspected by a professional if you are not experienced with car repairs.
• Monitor fuel economy and engine performance regularly.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with vehicles that have higher mileage or those that have not had regular maintenance.
Moderate – It is advisable to address this issue soon to prevent further engine performance issues.
Driving with a rich fuel mixture can lead to increased emissions and potential damage to the catalytic converter.
• Engine at operating temperature
• Vehicle driven under normal conditions
The post-catalytic oxygen sensor is located in the exhaust system after the catalytic converter on Bank 2.
Q: Can I drive with a P114C code?
A: It is possible to drive with this code, but it is not recommended as it can lead to further engine issues and increased emissions.
Q: How can I prevent a P114C code?
A: Regular maintenance and using quality fuel can help prevent this code.
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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.