2025 Session Last amended: 2023 session

§ 169A.41 — Preliminary Screening Test

Plain-Language Summary

When an officer suspects a driver of DWI, the officer may require the driver to take a preliminary breath test (PBT) at the scene using a portable device. The PBT result is used mainly to decide whether to arrest the driver and require a formal chemical test, but is generally not admissible as evidence of guilt at trial.

Practical Notes
When this applies: During a traffic stop when the officer suspects impaired driving. Who this affects: Any driver stopped by police on suspicion of DWI. Key points: The preliminary screening test (PBT) is a portable roadside breath test, different from the formal chemical test at the station. PBT results generally cannot be used as evidence of guilt at trial, but can be used to establish probable cause for the arrest and formal testing. PBT results can be used in implied consent hearings, civil lawsuits, and prosecutions for test refusal or underage drinking and driving. Refusing the PBT can itself be used as a basis for requiring a formal chemical test under section 169A.51.