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 is getting a high voltage signal from one of the oxygen sensors on the second side of the engine. It's like the sensor is shouting too loudly.
The P0164 code indicates that the oxygen sensor in the exhaust system on Bank 2, Sensor 3, is sending a voltage signal that is higher than expected.
Oxygen sensors measure the amount of oxygen in the exhaust gases and send this information to the engine control module (ECM). The ECM uses this data to adjust the air-fuel mixture. A high voltage signal from Bank 2 Sensor 3 suggests that the sensor is detecting a rich condition or there is a fault in the sensor or its circuit.
• Check Engine Light illuminated
• Poor fuel economy
• Rough engine idle
• Faulty oxygen sensor
• Wiring issues such as shorts or open circuits
• ECM malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the oxygen sensor and its wiring for damage.
• Test the sensor's voltage output with a multimeter.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Update or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regular maintenance and inspection of exhaust system
• Timely replacement of oxygen sensors
• Ensure proper engine tuning
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving extensively with this issue to prevent further damage.
Oxygen sensors are often covered under the vehicle's emissions warranty.
Oxygen sensor issues have been common as vehicles age, often due to sensor wear or exhaust leaks.
Moderate – It should be addressed soon to avoid poor fuel economy and potential damage.
Driving with a malfunctioning oxygen sensor may result in increased emissions, which can be illegal in some areas.
• Engine at operating temperature
• Vehicle running at idle
The oxygen sensor is located in the exhaust system on the side of the engine opposite to Bank 1.
Q: Can I drive with a P0164 code?
A: It's possible to drive for a short period, but it's best to fix the issue soon to avoid further problems.
Q: How do I know which sensor is Bank 2 Sensor 3?
A: Bank 2 refers to the side of the engine with cylinder 2. Sensor 3 is typically the third sensor in the exhaust stream.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
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.
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.