P2003
Diesel Particulate Filter Efficiency Below Threshold (Bank 2)
Severeexhaust
Overview
The P2003 code means the PCM has detected a diesel particulate filter efficiency below threshold (bank 2) 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
- Poor fuel economy
- Failed emissions test
- Increased exhaust noise
- Reduced engine performance
Common Causes
- Cracked exhaust pipe or joint
- Damaged exhaust manifold
- Exhaust leak before the sensor
- Failed catalytic converter
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 PalisadeChevrolet TahoeKia Telluride
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.