Alfa Romeo GT Diesel Particulate Filter DPF (2003-2010)

The Diesel Particulate Filter (DPF) on the Alfa Romeo GT is an exhaust system component found on diesel versions such as the 1.9 JTDM engine. Its purpose is to trap harmful fine particulates like soot and carbon emitted by the engine, aiding compliance with emission standards and reducing pollution.

The DPF filters exhaust gases through a porous substrate trapping up to 99 % of solid particles, which accumulate as soot. It regenerates in two ways:

• Passive regeneration: At high temperatures (~550-600 °C), typical on highways, soot burns off naturally.
• Active regeneration: When sensors detect excessive soot build-up, the engine control unit injects fuel to raise temperature and burn the soot.

This system typically lasts between 80,000 to 180,000 km without needing maintenance.

Common symptoms of DPF clogging include:

• Noticeable loss of engine performance and power reduction.
• Increased exhaust backpressure causing strain on the engine.
• Dashboard warning lights or DPF error codes.
• Excessive smoke during acceleration.

These issues often result from short urban trips, faulty sensors, a blocked EGR valve, or cold operating conditions that prevent proper regeneration.

To avoid DPF clogging and ensure proper function:

• Regularly drive your car for 20-30 minutes at 2000-3000 rpm, ideally on the highway, to allow passive regeneration.
• Keep the fuel level adequate and maintain the EGR valve and sensors in good condition.
• Address dashboard warnings promptly and perform diagnostics to detect sensor issues early.

Following these steps helps maintain the DPF and extends its service life.

DPF maintenance and repair options include:

• Replacement with a new original DPF: Offers the best reliability and complies fully with emission standards, with a 3-year warranty and up to 100,000 km coverage.
• Professional cleaning: Removes soot by dismantling the filter and chemical baths, restoring performance without ECU changes.
• Illegal removal or deletion: This is not recommended as it violates Euro emission regulations and increases pollution.

Choosing high-quality original parts and professional service preserves your vehicle’s performance and compliance.

Krosfou offers brand-new, high-performance original DPFs manufactured in Europe with a 3-year warranty limited to 100,000 km of use. Their products comply with manufacturer specs and European regulations, made with stainless steel and advanced ceramic monoliths for durability and performance.

Orders placed before noon with stock availability ship the same day. Free delivery is available for qualifying orders within Europe, and express options exist for quicker delivery. Unused and unmounted parts can be returned free within 30 days under conditions. Payment options include card, bank transfer, and instalments for convenience.

The DPF uses sensors to monitor pressure differential and temperature across the filter. When soot accumulates excessively, the engine ECU initiates active regeneration by injecting extra fuel to increase exhaust temperature and burn off soot. Passive regeneration happens automatically on long, high-speed drives.

• Active regeneration occurs especially after low-speed or short trips that don’t heat the filter enough.
• Proper sensor function is critical for timely and effective regeneration.
• Failure to regenerate leads to clogging and performance loss.

Following recommended driving patterns helps maintain efficient DPF operation and avoids issues.

If the DPF warning LED is lit, it indicates the filter is clogged or sensors detect abnormal conditions. Recommended steps include:

• Driving at sustained engine speeds (2000-3000 rpm) for 20-30 minutes on the highway to trigger passive regeneration.
• Scheduling a diagnostic check with an OBD reader to identify sensor faults or EGR issues.
• Considering professional DPF cleaning or replacement if warnings persist after attempts to regenerate.

Ignoring DPF warnings can lead to permanent filter damage and engine performance loss. Prompt action is essential for proper function and compliance.

For detailed guidance and spare parts, consult official Alfa Romeo GT documentation or trusted suppliers like Krosfou for original products and technical support.