Lonsbury Garage

If your diesel has a DPF light, frequent regens, reduced power, or an exhaust system warning, it’s time for diagnosis—not guessing. At Lonsbury Garage in Angola, IN, we specialize in DPF and exhaust system diagnostics to pinpoint the root cause of aftertreatment and drivability concerns. Our goal is simple: restore reliable performance, keep warning lights off, and prevent repeat failures.

Common DPF & Exhaust Problems We Diagnose

If you notice any of the following, schedule a diesel exhaust inspection:

• DPF / Check Engine light or “Exhaust Filter Full” messages
• Frequent regeneration cycles or regen that won’t complete
• Reduced power / limp mode with emissions-related codes
• Increased fuel consumption or strong exhaust smell
• Exhaust leaks (ticking noises, soot marks, fumes, or smell in cab)
• Boost / turbo performance issues related to backpressure or leaks
• Rattles from heat shields, pipes, or catalyst/DPF internals
• Sensor-related faults (pressure, temperature, NOx, O2 where equipped)

DPF Regen Issues: Diagnose the Cause First

DPF concerns are often a symptom—not the actual failure. Many issues originate upstream (engine performance) or downstream (aftertreatment components and sensors). Our process focuses on identifying what’s preventing a successful regen, such as:

• Exhaust leaks that skew sensor readings and regen strategy
• Differential pressure sensor or hoses plugged/failed
• Exhaust temperature sensor faults affecting regeneration control
• EGR problems increasing soot load
• Turbo/boost or intake issues causing incorrect air-fuel balance
• Fuel system concerns contributing to incomplete combustion
• Driving pattern that doesn’t allow full regen completion (short trips/extended idling)

Exhaust System Diagnostics & Leak Repair

A small leak can cause big problems—noise, fumes, poor performance, and false sensor readings that trigger warning lights. We locate leaks accurately and repair what’s needed without replacing parts unnecessarily. Our exhaust services may include:

• Exhaust leak inspection (manifold, gaskets, flex pipe, joints, clamps)
• Smoke testing when appropriate to find hard-to-see leaks
• Repair of broken studs, gaskets, and cracked components
• Pipe and hanger repairs to stop rattles and prevent stress failures
• Heat shield repairs to eliminate vibration noise

Aftertreatment & Sensor Testing

Modern diesel emissions systems rely on accurate sensors and correct exhaust flow. If sensor data is wrong, the system can command unnecessary regens, set codes, or reduce power. We can test and verify:

• DPF differential pressure sensors and related lines
• Exhaust temperature sensors and readings under real conditions
• NOx and oxygen sensors (as equipped)
• Wiring/connectors affected by heat and corrosion
• Scan data to confirm soot load, regen status, and system operation

DPF & Exhaust Service Near You

If you’re searching for DPF service near me, diesel exhaust repair in Angola, IN, or regen troubleshooting, call (260)665-5165. We’ll schedule an inspection, confirm what’s failing, and recommend the most reliable repair path.

DPF & Exhaust FAQs

Can I keep driving with a DPF light on?

It depends. Some warnings indicate the filter is loading and a regen is needed, while others indicate a fault that can lead to limp mode. Driving too long with high soot load can worsen restriction and damage components. If the light is flashing, power is reduced, or you have warning messages, schedule service soon.

Why does my diesel regen so often?

Frequent regens can happen when soot load builds quickly. Common reasons include excessive idling, repeated short trips, exhaust leaks, failed sensors, EGR issues, turbo/boost problems, or underlying engine performance concerns that increase soot.

Why does my truck smell like exhaust inside the cab?

This is often an exhaust leak near the engine bay (manifold, up-pipes, gaskets) or a leak under the vehicle that can be pulled into the cabin. Exhaust fumes are a safety concern—schedule an inspection promptly.