Two critical elements that need to be checked out at 100,000 miles are the EGR valve and the DPF. Hasten says to run a computerized flow test on the DPF filter tol show if the filter in the exhaust ...

Beginning in October, the exhaust from newly manufactured diesel engines must produce half the oxides of nitrogen (NOx) of engines produced today with no increase in particulate matter (PM). This is ...

Volvo developed Precision Flow exhaust-gas recirculation (EGR) to improve fuel economy by 3 percent even as they met EPA's 2007 emissions standards for on-road diesel engines. An electronic ...

All 2005-07 Acura RL sedans, in addition to 2008 models built from VIN JH4KB16..8C000001 through JH4KB16..8C004681, may turn on the check engine light and store DTC P0401 (insufficient EGR flow) in ...

Q: I took my car to my mechanic for the check engine light being on. He checked the codes and said it’s an “EGR fault” He said it would be a couple of days before he could get to it. He said I could ...