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 one of the car's sensors, which checks how clean the engine is running, is taking too long to send information. It's like when your friend is slow to answer your text messages.
The O2 sensor is responsible for measuring the amount of oxygen in the exhaust gases. A slow response indicates that the sensor is not switching between rich and lean conditions as quickly as expected.
The P0145 code is triggered when the Engine Control Module (ECM) detects that the oxygen sensor for bank 1, sensor 3 is not responding quickly enough to changes in the exhaust gas composition. This can affect the vehicle's fuel efficiency and emissions.
• Check Engine Light is on
• Poor fuel economy
• Rough engine idle
• Faulty O2 sensor
• Wiring issues or poor electrical connections
• Exhaust leaks
O2 Sensor: A device that measures the oxygen level in the exhaust gases.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the O2 sensor for proper operation.
• Replace the faulty O2 sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain the vehicle's exhaust system.
• Use high-quality fuel to prevent sensor contamination.
• Perform regular engine tune-ups.
Sensor Issue
• If the Check Engine Light is on, have the vehicle inspected as soon as possible.
• Monitor fuel efficiency and address any sudden changes.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
The P0145 code has been associated with older vehicles where sensor degradation is common due to age and mileage.
Moderate – While the vehicle may still operate, it can lead to increased emissions and reduced fuel efficiency.
Driving with a faulty O2 sensor can increase emissions and may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle in closed loop operation
Bank 1 Sensor 3 is typically located after the catalytic converter on the exhaust system of the engine's first bank.
Q: Can I drive my car with a P0145 code?
A: It's possible to drive, but it's not recommended as it can lead to increased emissions and potentially damage the catalytic converter.
Q: How long does it take to fix a P0145 code?
A: Repair time can vary, but typically it takes a couple of hours to diagnose and replace a faulty sensor.
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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.