Congress moves to block fuel-saving car technology, favoring automakers

What it does

This bill directs the EPA and Department of Transportation to repeal or rescind any federal actions, policies, or regulations designed to encourage, incentivize, promote, or require automakers to install engine idle start-stop technology in vehicles within one year. The agencies are also barred from issuing similar new rules. However, they may NOT repeal such rules if doing so would increase the risk of carbon monoxide poisoning. The bill requires two progress reports to Congress.

Why we flagged it

The bill's operative mechanism is a mandate to repeal federal policies that promote fuel-efficiency technology. While framed as eliminating a 'nuisance,' the bill's actual function is to reduce regulatory pressure on automakers to adopt emissions-reducing technology, benefiting the automotive industry at the expense of environmental and climate goals.

What the text implies

• Repealing idle start-stop promotion rules may slow adoption of a technology that reduces fuel consumption by 3–10%, increasing long-term fuel costs for consumers and carbon emissions.
• The exception for carbon monoxide risk is narrow and applies only to repeal decisions; it does not prevent the bill from blocking NEW regulations that would promote the technology for safety or efficiency reasons.
• The bill's title ('Eliminating Start-Stop Engine Nuisance Technologies') frames a fuel-efficiency technology as a consumer annoyance, potentially misleading Congress about the trade-off between convenience and environmental/economic benefit.
• Repealing EPA/DOT promotion of idle start-stop may indirectly benefit automakers by reducing compliance costs, even though the technology is increasingly standard in new vehicles.

Section numbers refer to the bill text the analysis read — linked under Primary records below.

Who it affects

The bill removes regulatory pressure on automakers to adopt idle start-stop technology, which may reduce vehicle costs and consumer inconvenience (start-stop systems can be annoying). However, idle start-stop technology reduces fuel consumption and emissions, delivering environmental and long-term cost benefits to consumers and the public. The exception for carbon monoxide safety is a genuine constraint, but the bill's core effect is to weaken environmental/efficiency standards that benefit publ

Who stands to gain

• automotive manufacturers (reduced regulatory compliance pressure)
• oil and gas industry (slower adoption of fuel-efficiency technology)

Named in the bill

Environmental Protection Agency (EPA), Department of Transportation (DOT), automotive manufacturers, Congress

Where it stands

1 cosponsor: 1 Republicans.

• Nov 20, 2025 — Introduced · Congress.gov: “Introduced in House”
• Nov 20, 2025 — Referred to House Committee on Energy and Commerce · Congress.gov: “Referred to the House Committee on Energy and Commerce”

Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.

Money around this bill

1 lobbying clients named this bill on 1 disclosure filings across 1 quarter, Jun 2026 to Jun 2026. Those filings disclosed $660,000 in lobbying spend. A filing names 66 bills on average, so that figure is what each filing reported, not a share belonging to this bill.

More lobbying clients named this bill than 0% of bills with at least one filing.

Doug LaMalfa, the sponsor, reported $279,010 in PAC receipts in the 2026 cycle.

• Americans for Prosperity — $660,000 on 1 filing

Lobbying Disclosure Act filings through Jul 16, 2026. A filing shows who paid to lobby on a bill it names, not what changed.