Diesel EGR (Exhaust Gas Recirculation) + California Smog
EGR recirculates exhaust gases back into the engine to reduce NOx emissions. Critical for diesel smog passage — deleted EGR causes immediate California smog failure (visual inspection catches missing components).
Common EGR (Exhaust Gas Recirculation) smog issues
EGR cooler clogging (common on 6.7L Cummins), EGR valve sticking open, deleted EGR system
How to fix
EGR cooler replacement, valve cleaning/replacement, OEM emissions restoration if deleted
Typical repair cost
$200-$2,000+
Common questions
What is EGR (Exhaust Gas Recirculation)?
EGR recirculates exhaust gases back into the engine to reduce NOx emissions. Critical for diesel smog passage — deleted EGR causes immediate California smog failure (visual inspection catches missing components).
What causes a EGR (Exhaust Gas Recirculation) smog failure?
EGR cooler clogging (common on 6.7L Cummins), EGR valve sticking open, deleted EGR system
How is EGR (Exhaust Gas Recirculation) fixed?
EGR cooler replacement, valve cleaning/replacement, OEM emissions restoration if deleted
What does fixing cost?
$200-$2,000+