Banking Emissions Testing Trucking 
Tomorrow's Technician
MAY 13, 2024
This standardized many of the onboard emissions protocols and codes and allowed states to perform onboard emissions testing. As time passed, even large trucks and motorcycles adopted this same method to test the emissions status of a vehicle. The freeze frame data is stored when a test fails or a DTC is set.
RepairSmith
JANUARY 15, 2024
Failed Emissions Test A malfunctioning fuel pump delivering too much fuel could make the vehicle’s engine run rich, leading to a failed emissions test. However, don’t worry about refueling when a truck fills gas station tanks — you won’t get contaminated fuel. But how can you confirm fuel pump failure?
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