CARB will hold a public hearing on Nov. 15, 2018 in Sacramento, CA to consider approving for adoption the proposed amendments to California's HD OBD and OBD System Requirements for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles and Engines (OBD II). Written comments on the proposed are due by 5 pm, Nov. 13, 2018.
The proposed amendments to the HD OBD regulation include:
Clarifying the requirements for intrusive diagnostics
Revising the in-use monitor performance ratio (IUMPR) requirements, including increasing the minimum required ratio, adding monitors required to track and report the in-use monitor performance ratio data, and revising the requirements to address plug-in hybrid electric vehicles
Revising the criteria manufacturers must meet to be exempt from monitoring the feedgas generation performance of the non-methane hydrocarbon (NMHC) catalyst and catalyzed particular matter (PM) filter • Revising the gasoline and diesel crankcase ventilation system monitoring requirements
Specifying more detailed monitoring requirements for hybrid vehicles
Updating the SAE International (SAE) and International Organization for Standardization (ISO) document references • Revising the readiness status requirements for exhaust gas/oxygen sensors and sensor heaters
Adding data collection requirements as part of over-the-air reprogramming events
Adding data stream parameters required to be reported to assist with CARB programs (e.g., REAL)
Revising the certification demonstration testing requirements to revise the test engine aging requirements, clarify the allowable test sequence procedure, and add more data to be collected during testing
Adding items required to be submitted as part of the certification application
Revising the fines applicable to deficiencies
Revising the production engine/vehicle evaluation testing requirements to require permanent fault code erasure testing and to collect more data from in-use engines/vehicles
CARB is also proposing similar amendments to the OBD II regulation section 1968.2, where necessary, for medium-duty diesel engines and vehicles to harmonize the requirements of the two regulations. Additionally, while staff was not planning to do an update to the OBD II regulation this year that would affect light-duty vehicles, staff has determined based on comments from manufacturers that a few additional regulation changes are needed immediately in order to ensure manufacturers are able to certify 5 near future vehicles that comply with the OBD II regulation. Staff has also found an issue related to the definition of "active off-cycle credit technology" in the OBD II regulation and is proposing an amendment to address this.
CARB is also proposing amendments to the HD OBD enforcement regulation (section 1971.5) to align with some of the proposed changes to the HD OBD regulation, correct some oversights and errors, and address manufacturers' workload issues. These include changes to the nonconforming criteria to account for the proposed revised in-use monitor performance ratios, relaxations to the mandatory recall interim thresholds for alternate-fueled engines, and relaxations to the manufacturer self-testing requirements.
The hear notice and all related regulatory documents are available on CARB's website for this rulemaking at https://www.arb.ca.gov/regact/2018/hdobd18/hdobd18.htm?utm_medium=email&utm_source=govdelivery