 Annual safety testing for all on-road vehicles  OBD testing for diesels since October 2008  Annual OBD test for vehicles 1 to 15 years old and Change of Ownership  MY1997+ light-duty diesels<=8,500 lbs.  MY2007+ med-duty diesels<=14,000 lbs.  Someday heavy-duty diesels>14,000 lbs. starting with MY2013?

 6,869 Light-duty and 8,966 Med-duty tested  Diesels were 0.13% of light-duty OBD fleet  Diesels were 30% of medium-duty OBD fleet

 Compression Ignition vehicles use different OBD monitor names than Spark ignition?  Think about your VIRs! Spark IgnitionCompression Ignition CatalystNMHC Catalyst Heated catalystNOx after-treatment Evaporative systemISO/SAE reserved Secondary Air SysBoost Pressure Sys O2 sensorExhaust gas sensor O2 sensor heaterPM filter EGR &/or VVT Sys

Failure RatesLDDVs Tampering0.00% DLC0.03% Communication0.16% RPM0.01% MIL on3.4% Readiness only3.2% Overall OBD Fail Rate6.9% Entire OBD Fleet All MYs 0.01% 0.02% 0.30% 0.03% 3.6% 3.3% 7.1%

DTCDescription% of all P0380Glow Plug/Heater Circuit 'A' Malfunction19% P0673Cylinder 3 Glow Plug Circuit Fault8% P0672Cylinder 2 Glow Plug Circuit Fault7% P0674Cylinder 4 Glow Plug Circuit Fault6% P0401EGR Flow insufficient5%

MonitorNot Ready Rate NMHC Catalyst6.3% NOx after-treatment 4.3% Boost Pressure Sys 1.5% Exhaust gas sensor 5.1% PM filter 9.4% EGR &/or VVT Sys 2.7%

OBD ResultsMDDVs MY2007+ Tampering0.02% DLC0.03% Communication0.40% RPM0.02% MIL on3.2% Readiness3.4% Overall OBD Fail Rate7.1% OBD Fleet MY % 0.02% 0.12% 0.03% 0.5% 1.4% 2.0%

DTCDescription% of all P0401 EGR Flow insufficient7.4% P040B EGR Temp Sensor 1 Circuit Performance6.3% P0674 Cylinder 4 Glow Plug Circuit Fault5.5% P0544 Exhaust Gas Temp Sensor Bank 14.5% P2457 EGR cooling system performance4.3%

 Investigating with Cummins and Chrysler  We are giving them a year to solve problem ◦ We agreed to exempt vehicles that fail readiness ◦ They agreed to honor their “fix” even if beyond the warranty period