P2002
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
Severeexhaust
Overview
The P2002 code means the PCM has detected a diesel particulate filter efficiency below threshold (bank 1) fault. This code relates to the exhaust system components that manage and monitor exhaust gas flow, pressure, and filtering. An issue in the exhaust system can affect engine efficiency, emissions output, and overall vehicle performance.
Symptoms
- Check Engine Light (MIL) illuminated
- DPF warning light illuminated
- Increased exhaust noise
- Poor fuel economy
Common Causes
- Clogged diesel particulate filter (DPF)
- Failed catalytic converter
- EGR system malfunction affecting exhaust
- Cracked exhaust pipe or joint
Diagnosis Steps
- 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
- 2Visually inspect the exhaust system for leaks, cracks, or damage
- 3Test the exhaust pressure or temperature sensor with a multimeter
- 4Check the DPF or catalytic converter for blockage
- 5Inspect wiring and connectors for the exhaust circuit
Estimated Repair Cost
$150 — $1,200
Cost varies by vehicle, location, and repair shop. Includes parts and labor.
Commonly Affected Vehicles
Ford ExplorerHyundai PalisadeSubaru CrosstrekJeep Cherokee
Related Codes
More Exhaust Codes
Frequently Asked Questions
Minor exhaust codes may not affect immediate drivability, but exhaust leaks can allow harmful gases into the cabin. Have exhaust issues inspected promptly for safety reasons.