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 has detected that the conditions aren't right for the car to clean its special filter that catches pollution. It's like when you want to wash your hands, but there's no soap or water available.
The vehicle's engine control module (ECM) has determined that the conditions necessary for the diesel particulate filter (DPF) regeneration process are not met.
The P246B code is triggered when the ECM detects that the conditions required for the regeneration of the diesel particulate filter are not met. This could be due to incorrect engine temperature, vehicle speed, or other parameters that are not within the specified range for regeneration to occur.
• Check engine light is on
• Reduced engine performance
• Increased fuel consumption
• Incorrect engine temperature
• Low fuel level
• Faulty exhaust temperature sensor
Diesel Particulate Filter (DPF): A filter designed to capture and store exhaust soot in order to reduce emissions from diesel engines.
Regeneration: The process of cleaning the diesel particulate filter by burning off accumulated soot.
• Check for additional codes
• Inspect the exhaust temperature sensor
• Verify fuel level and engine temperature
• Replace faulty sensors
• Ensure proper fuel level
• Reset the ECM
• OBD-II scanner
• Multimeter
• Thermometer
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly check and maintain fuel levels
• Ensure proper engine warm-up
• Perform regular vehicle maintenance
Engine Performance
• Avoid short trips that prevent full engine warm-up
• Regularly drive at highway speeds to allow for DPF regeneration
Check with your vehicle manufacturer for specific warranty coverage related to emissions control systems.
This code has become more common with the introduction of stricter emissions standards and the widespread use of diesel particulate filters.
Moderate – It is important to address this issue to prevent further engine performance problems and potential damage to the DPF.
Ignoring this code can lead to increased emissions and potential legal issues with vehicle inspections.
• Engine at operating temperature
• Vehicle driven at highway speeds
The diesel particulate filter is located in the exhaust system, typically near the catalytic converter.
Q: Can I drive with a P246B code?
A: It's possible to drive with this code, but it is not recommended as it can lead to increased emissions and reduced engine performance.
Q: What happens if I ignore the P246B code?
A: Ignoring this code can lead to a clogged diesel particulate filter, reduced engine performance, and increased emissions.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.