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 a part of the car that helps clean the exhaust is getting too hot. It's like when you touch something that's too hot and it burns you, but for the car.
The Selective Catalytic Reduction (SCR) system is overheating, which can affect its ability to reduce nitrogen oxides (NOx) emissions.
The SCR system uses a catalyst to convert NOx emissions into nitrogen and water. If the catalyst gets too hot, it can become damaged or less effective. This code indicates that the temperature of the SCR catalyst on Bank 1 is above the normal operating range.
• Check engine light on
• Reduced engine performance
• Increased exhaust emissions
• Faulty temperature sensor
• Excessive fuel injection
• Malfunctioning exhaust gas recirculation (EGR) system
SCR: Selective Catalytic Reduction
NOx: Nitrogen Oxides
• Check for any other related codes
• Inspect the SCR temperature sensor
• Test the EGR system functionality
• Replace faulty temperature sensor
• Repair or replace EGR system components
• Inspect and repair fuel injection system
• OBD-II scanner
• Multimeter
• Temperature probe
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Dodge Ram 2500
• Regular maintenance of the exhaust system
• Use high-quality fuel
• Ensure proper engine tuning
Emission Control System Issue
• Avoid driving aggressively until the issue is fixed
• Schedule a service appointment promptly
Check with the vehicle manufacturer for emissions-related warranty coverage.
This code has become more prevalent with the increased use of SCR systems to meet emissions standards.
Moderate – Should be addressed soon to prevent damage to the SCR system.
Ignoring this issue can lead to increased emissions, which may violate emissions regulations.
• Engine at operating temperature
• Vehicle driven under normal conditions
The SCR catalyst is located in the exhaust system, typically near the catalytic converter.
Q: Can I drive my car with this code?
A: It's best to get it checked soon, as driving with this issue can cause more damage.
Q: What happens if I ignore this code?
A: Ignoring it can lead to higher emissions and potential damage to the SCR 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.