Gather these five details
- Fresno-area location and where the vehicle or removed filter is held
- Vehicle year, engine model and DPF part number if available
- Warning messages, recent service and prior cleaning records
- Whether removal, transport and reinstall are needed
- Number of filters and the required return-to-service window
Public resources for your property
For a Fresno vehicle or fleet, keep equipment service and CARB compliance records separate. Give the provider the actual engine and filter information; this website does not determine vehicle compliance.
- CARB DPF problem-resolution guidance
Use CARB’s installer and manufacturer contact routes for persistent DPF problems; cleaning does not settle an underlying fault.
- CARB Clean Truck Check overview
Check the separate emissions-compliance program for the actual vehicle. A cleaning receipt is not a passing compliance test.
Five questions for the written proposal
Open a topic for the question to ask and what to compare.
Accepted filter
Ask: Is this exact filter accepted for the process?
Send the part details and ask what condition checks determine acceptance.
Work boundary
Ask: Are removal, diagnostics and reinstall included?
Separate bench service from vehicle labor and underlying fault work.
Inspection
Ask: What checks and before/after records are provided?
A cleaning invoice alone does not describe the filter’s condition.
Exceptions
Ask: How are damaged or unserviceable filters handled?
Agree charges, rejection terms and authorization before replacement is added.
Logistics
Ask: What transport and turnaround terms are confirmed?
Record collection, shipping or drop-off responsibilities and the actual promised window.