Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a special filter that catches pollution from the engine. This code means that the filter might be clogged or blocked, making it hard for the car to breathe out properly.
The code indicates that the pressure difference across the diesel particulate filter (DPF) on bank 1 is higher than expected, suggesting a possible blockage or restriction.
The P244B code is triggered when the engine control module (ECM) detects a higher than normal pressure differential across the diesel particulate filter (DPF) on bank 1. This can occur due to excessive soot accumulation or a malfunctioning pressure sensor.
• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption
• Clogged diesel particulate filter (DPF)
• Faulty differential pressure sensor
• Exhaust leaks or restrictions
DPF: Diesel Particulate Filter
ECM: Engine Control Module
• Scan the vehicle for additional codes.
• Inspect the DPF for signs of blockage.
• Test the differential pressure sensor for proper operation.
• Clean or replace the diesel particulate filter.
• Replace the differential pressure sensor if faulty.
• Repair any exhaust leaks or restrictions.
• OBD-II scanner
• Multimeter
• Exhaust backpressure gauge
$200 - $2000
Moderate
• Ford F-Series
• Chevrolet Silverado
• Ram 1500
• Regularly inspect and maintain the DPF.
• Use high-quality diesel fuel.
• Avoid short trips that prevent proper DPF regeneration.
Emission Control
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Check your vehicle's warranty for coverage on emission-related components.
The P244B code has been more prevalent in diesel vehicles with advanced emission control systems.
High – Address promptly to avoid engine damage or reduced performance.
Driving with a malfunctioning DPF can lead to increased emissions and potential legal issues.
• Engine at operating temperature
• Vehicle driven under normal conditions
The differential pressure sensor is typically located near the diesel particulate filter in the exhaust system.
Q: Can I drive with a P244B code?
A: It's not recommended to drive with this code as it can lead to further engine damage and increased emissions.
Q: How often should the DPF be cleaned?
A: The DPF should be inspected regularly and cleaned as needed, typically every 50,000 to 100,000 miles.
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.