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 getting a signal from an oxygen sensor that is too high. It's like when a thermometer shows a temperature that's way too hot even though it's not that hot outside.
The P2246 code is triggered when the powertrain control module (PCM) detects a high voltage signal from the oxygen sensor's reference voltage circuit for Bank 1 Sensor 1.
The oxygen sensor measures the amount of oxygen in the exhaust gases to help the engine run efficiently. Bank 1 Sensor 1 is the sensor located before the catalytic converter on the side of the engine with cylinder 1. A high voltage signal could indicate a problem with the sensor, wiring, or the PCM itself.
• Check Engine Light is on
• Poor fuel economy
• Rough engine idle
• Faulty oxygen sensor
• Wiring issues such as a short circuit
• Faulty PCM
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
Oxygen Sensor: A device that measures the oxygen level in the exhaust gases.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the oxygen sensor with a multimeter.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance checks
• Ensure proper sensor installation
• Avoid harsh driving conditions
Sensor Issue
• Don't ignore the Check Engine Light.
• Get the vehicle inspected by a professional.
• Avoid driving the vehicle extensively until repaired.
Oxygen sensors may be covered under emissions warranty. Check with the vehicle manufacturer.
This code has been associated with sensor and wiring issues in various models, often due to wear and tear.
Moderate – Addressing this issue can prevent further engine performance problems.
Driving with a faulty oxygen sensor can lead to increased emissions, which may not comply with local regulations.
• Engine at operating temperature
• Vehicle in closed-loop operation
The Bank 1 Sensor 1 oxygen sensor is located on the exhaust manifold of the engine, before the catalytic converter.
Q: Can I drive with a P2246 code?
A: It's not recommended to drive extensively with this code as it can lead to poor engine performance and increased emissions.
Q: How can I prevent P2246 from occurring?
A: Regular vehicle maintenance and inspections can help prevent issues with oxygen sensors and wiring.
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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.