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 there is a problem with the power supply to the heater that helps the car's exhaust system work better. It's like if the heater in your house wasn't getting electricity and couldn't warm up.
The heated catalyst is part of the car's exhaust system that helps reduce pollution. It needs power to heat up and work properly. If there's an open circuit, it means electricity can't flow to the heater.
The P1459 code indicates that the power supply circuit to the heated catalyst heater on Bank 2 is open, meaning there is a break or disconnection in the wiring or components that supply power to the heater. This can prevent the catalyst from reaching optimal operating temperature, affecting emissions control.
• Check engine light is on
• Increased emissions
• Failed emissions test
• Broken or damaged wiring
• Faulty heated catalyst heater
• Blown fuse
Catalyst: A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
Heated Catalyst: A catalyst that is equipped with a heater to bring it to operating temperature more quickly.
• Check for any blown fuses related to the heated catalyst heater.
• Inspect the wiring and connectors for damage or disconnection.
• Test the heated catalyst heater for proper operation.
• Replace any blown fuses.
• Repair or replace damaged wiring or connectors.
• Replace the heated catalyst heater if it is faulty.
• Multimeter
• Wire strippers
• Socket set
$100 - $500
Moderate
• Honda Accord
• Toyota Camry
• Ford Fusion
• Regular inspection of exhaust system components
• Timely replacement of faulty parts
• Keeping electrical connections clean and secure
Sensor Issue
• Have the vehicle inspected by a professional if the check engine light is on.
• Avoid driving the vehicle excessively until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for specific warranty coverage on emissions-related components.
This code has been associated with vehicles that have advanced emissions control systems, particularly those with heated catalysts.
Moderate – While not immediately critical, it should be addressed to ensure proper emissions control and vehicle performance.
Driving with a malfunctioning emissions system may violate local emissions regulations and contribute to environmental pollution.
• Engine must be running
• Vehicle should be at operating temperature
The heated catalyst heater is located in the exhaust system, typically near the catalytic converter on Bank 2.
Q: What is Bank 2?
A: Bank 2 refers to the side of the engine opposite Bank 1, which contains cylinder 1. In a V-type engine, Bank 2 is the side with the second cylinder.
Q: Can I drive with a P1459 code?
A: While the car may still be drivable, it's best to have it checked soon to avoid increased emissions and potential damage to the exhaust system.
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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 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.