Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the system that helps reduce pollution from your car's exhaust. It's like when your toy's battery is low and it doesn't work properly.
The P205F code indicates that the reductant system, which helps reduce emissions in diesel engines, is not performing as expected on bank 2.
The reductant system, commonly known as the diesel exhaust fluid (DEF) system, is responsible for injecting a urea-based fluid into the exhaust stream to reduce nitrogen oxide emissions. The P205F code is triggered when the system's performance is not within the expected range for bank 2, which refers to one side of the engine.
• Check Engine Light is on
• Reduced engine performance
• Increased exhaust emissions
• Faulty reductant injector
• Clogged reductant line
• Defective reductant pump
Reductant: A substance used to reduce pollutants in exhaust gases.
DEF: Diesel Exhaust Fluid, a urea-based solution used in diesel engines to reduce emissions.
• Scan for additional trouble codes
• Inspect reductant injector and lines for clogs
• Test reductant pump functionality
• Replace faulty reductant injector
• Clean or replace clogged reductant lines
• Replace defective reductant pump
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $800
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly check and refill DEF tank
• Use high-quality DEF fluid
• Perform routine maintenance checks
Emission Control System Issue
• Do not ignore the check engine light
• Consult a professional mechanic
• Avoid driving long distances until repaired
Emission-related components may be covered under a federal emissions warranty.
This code has become more common with the increased use of DEF systems in diesel engines to meet stricter emission standards.
Moderate – Addressing this issue promptly can prevent further engine damage and ensure compliance with emissions standards.
Operating a vehicle with a malfunctioning emission system may violate environmental regulations and lead to fines.
• Engine at operating temperature
• Vehicle in motion
The reductant system components are typically located near the exhaust system and DEF tank, often on the underside of the vehicle.
Q: What is a reductant system?
A: A reductant system is used in diesel engines to reduce harmful emissions by injecting a urea-based fluid into the exhaust.
Q: Can I drive with a P205F code?
A: It's not recommended to drive long distances with this code, as it can lead to increased emissions and potential engine performance issues.
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