Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer thinks there's not enough fuel in the exhaust after it has gone through the catalytic converter on one side of the engine.
This code indicates that the oxygen sensor located after the catalytic converter on Bank 1 is detecting a lean condition, meaning there's too much air and not enough fuel in the exhaust gases.
The P114B code is triggered when the engine control module (ECM) detects that the post-catalyst oxygen sensor on Bank 1 is reporting a lean condition. This can occur due to a variety of issues, such as a vacuum leak, faulty oxygen sensor, or fuel delivery problems.
• Check Engine Light is on
• Poor fuel economy
• Rough idle
• Vacuum leak
• Faulty post-catalyst oxygen sensor
• Fuel injector issues
Lean Condition: A situation where there is too much air and not enough fuel in the engine's air-fuel mixture.
Oxygen Sensor: A sensor that measures the amount of oxygen in the exhaust gases.
• Use an OBD-II scanner to confirm the code.
• Inspect for vacuum leaks.
• Test the post-catalyst oxygen sensor.
• Repair any vacuum leaks.
• Replace the faulty oxygen sensor.
• Check and clean fuel injectors.
• OBD-II scanner
• Vacuum gauge
• Multimeter
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain the exhaust system.
• Ensure proper fuel quality.
• Perform regular engine tune-ups.
Engine Performance
• Do not ignore the Check Engine Light.
• Regularly maintain your vehicle to prevent issues.
Check with the vehicle manufacturer for specific warranty coverage on emissions components.
This code has been more prevalent in vehicles with high mileage or those that have not been regularly maintained.
Moderate – Should be addressed soon to prevent further engine performance issues.
Driving with a lean condition can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in closed-loop mode
The post-catalyst oxygen sensor is located in the exhaust system, downstream of the catalytic converter on Bank 1.
Q: Can I drive with a P114B code?
A: It's not recommended to drive for extended periods with this code, as it can lead to engine damage.
Q: How can I fix a P114B code?
A: Start by checking for vacuum leaks and testing the oxygen sensor. Repairs may involve replacing faulty components.
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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.