GPF / OPF Petrol Particulate Filter Software Solutions

Gasoline Particulate Filters (GPF), also known as Otto Particulate Filters (OPF), are fitted to many modern direct-injection petrol vehicles to reduce particulate emissions from the exhaust.

Like other emissions-control systems, GPF/OPF systems can develop faults involving the filter itself, pressure and temperature sensors, regeneration strategies or associated engine management systems.

At Redline Remaps, we provide GPF/OPF-related diagnostics and ECU software services for suitable vehicles and applications.

What is a GPF / OPF?

A GPF or OPF is installed within the vehicle's exhaust system and is designed to capture fine particulate matter produced during combustion.

The principle is similar to a diesel particulate filter (DPF), although petrol engines generally operate at higher exhaust temperatures and the regeneration strategy can differ considerably.

Depending on the vehicle, the system may use:

• Gasoline/Otto particulate filter
• Differential pressure sensors
• Exhaust temperature sensors
• Oxygen and emissions sensors
• ECU filter monitoring
• Regeneration strategies
• Engine management software

Common GPF / OPF Problems

Although GPF/OPF systems can generally operate with little driver involvement, faults can still occur.

Common problems can include:

• Filter Blockage – Excessive particulate accumulation can restrict exhaust flow
• Regeneration Problems – Operating conditions or engine faults may prevent the filter from regenerating correctly
• Pressure Sensor Faults – Incorrect readings can affect filter monitoring
• Temperature Sensor Faults – Failed or inaccurate sensors can interfere with regeneration and diagnostics
• Engine Management Warnings – GPF/OPF-related faults can trigger warning lights and stored fault codes
• Reduced Performance – A heavily restricted filter or associated fault may affect engine operation

A GPF/OPF fault code does not necessarily mean the filter itself requires replacement. Correct diagnosis is important before replacing components.

GPF / OPF Diagnostics & Software Services

We can diagnose GPF/OPF-related faults and advise on the appropriate repair or ECU software options available for the vehicle and its intended use.

Depending on the vehicle, diagnostic procedures may include checking:

• Stored ECU fault codes
• Differential pressure readings
• Exhaust temperature data
• Filter loading information
• Regeneration status and history
• Relevant sensor and engine data

This can help determine whether the problem originates from the particulate filter itself or another component affecting its operation.

GPF / OPF Software Modifications

Certain dedicated track, competition and non-road applications may use modified exhaust systems where the original GPF/OPF configuration is no longer present. In these applications, corresponding changes to the ECU's filter monitoring and associated software strategies may be required.

Important: GPF and OPF systems form part of a vehicle's emissions-control equipment. Vehicles used on UK public roads must remain compliant with applicable emissions and road-use requirements.

Software modifications that disable required emissions-control functionality are therefore only suitable where legally permitted, such as certain dedicated track, competition or other applicable non-road uses.

For road-going vehicles, GPF/OPF faults should be properly diagnosed and the emissions system repaired or restored to correct operation.

Having GPF / OPF Problems?

If your vehicle has a GPF/OPF warning, engine management light, reduced performance or particulate filter-related fault codes, contact Redline Remaps with your vehicle registration and details of the problem.

We can assess the vehicle and advise on the appropriate diagnostic and ECU software options available.