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 getting a signal from one of the oxygen sensors in the engine. It's like trying to call a friend, but their phone is off.
The P2247 code indicates an issue with the reference voltage circuit for the oxygen sensor located on Bank 2, Sensor 1. The circuit is either open or not functioning correctly.
The oxygen sensor provides feedback to the engine control module (ECM) about the oxygen levels in the exhaust gases. This information is crucial for adjusting the air-fuel mixture. An open or faulty reference voltage circuit can disrupt this feedback, leading to improper engine performance.
• Check Engine Light is on
• Poor fuel economy
• Rough engine idle
• Increased emissions
• Faulty oxygen sensor
• Damaged wiring or connectors
• Blown fuse in the sensor circuit
• Faulty ECM
OBD-II: On-Board Diagnostics, second generation
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Check the fuse related to the oxygen sensor circuit.
• Test the oxygen sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty oxygen sensor.
• Replace the blown fuse.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
• Wire repair tools
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain wiring harnesses.
• Use high-quality fuel to prevent sensor contamination.
• Perform regular vehicle diagnostics.
Sensor Issue
• Address the issue promptly to avoid further engine damage.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
Oxygen sensor issues have been a common diagnostic trouble code since the introduction of OBD-II systems.
Moderate – While the vehicle may still run, ignoring this issue can lead to increased emissions and reduced fuel efficiency.
Driving with a faulty oxygen sensor can lead to increased emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle in closed-loop operation
The oxygen sensor is located on the exhaust manifold of Bank 2, which is typically the side of the engine opposite the number one cylinder.
Q: Can I drive my car with a P2247 code?
A: You can drive the car, but it's not recommended for long periods as it can lead to poor fuel economy and increased emissions.
Q: How do I know if my oxygen sensor is bad?
A: Common signs include a check engine light, poor gas mileage, and rough idling.
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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.