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 is having trouble reading the oxygen sensor that's located after the catalytic converter on the side of the engine with cylinder 1.
The P0136 code is triggered when the Engine Control Module (ECM) detects a problem with the circuit of the oxygen sensor located after the catalytic converter on bank 1.
The oxygen sensor (O2 sensor) measures the amount of oxygen in the exhaust gases and sends this information to the ECM. The ECM uses this data to adjust the air-fuel mixture for optimal combustion. Bank 1 refers to the side of the engine with cylinder 1, and Sensor 2 is the sensor located after the catalytic converter. A P0136 code indicates that the ECM is receiving a faulty or no signal from this sensor.
• Check Engine Light is on
• Poor fuel economy
• Rough engine idle
• Failed emissions test
• Faulty oxygen sensor
• Damaged wiring or connectors
• Exhaust leaks
• Faulty ECM
ECM: Engine Control Module
O2 Sensor: Oxygen Sensor
Bank 1: The side of the engine with cylinder 1
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the oxygen sensor for proper operation.
• Check for exhaust leaks.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain exhaust system.
• Ensure proper engine maintenance to avoid rich or lean conditions.
• Use high-quality fuel to prevent sensor contamination.
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional mechanic if unsure about repairs.
Check your vehicle's warranty for coverage on emissions-related components.
The P0136 code has been a common diagnostic trouble code since the introduction of OBD-II systems in the mid-1990s, often associated with sensor wear and tear.
Moderate – Should be addressed soon to maintain vehicle performance and emissions compliance.
Driving with a malfunctioning oxygen sensor can lead to increased emissions and reduced fuel efficiency. It may also cause your vehicle to fail an emissions test.
• Engine at operating temperature
• Vehicle in closed-loop mode
The oxygen sensor is located in the exhaust system, after the catalytic converter on the side of the engine with cylinder 1.
Q: Can I drive with a P0136 code?
A: While you can drive with this code, it's not recommended as it may reduce fuel efficiency and increase emissions.
Q: How do I know if my oxygen sensor is bad?
A: Symptoms include poor fuel economy, rough idle, and a check engine light. An OBD-II scanner can confirm the issue.
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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.