# Low Pressure Warning Device missing, inoperative, or does not operate at 55 psi and below, or 1/2 the governor cut-out pressure, whichever is less — Vehicle inspection defect categories: MOT major, minor and dangerous verdicts

For Low Pressure Warning Device missing, inoperative, or does not operate at 55 psi and below, or 1/2 the governor cut-out pressure, whichever is less, category is Reject; inspection item number is 1; defect reference is f; inspection item is Brake System; authority is US 49 CFR Appendix A to Part 396, recorded from its source on 2026-08-06.

- **Defect:** Low Pressure Warning Device missing, inoperative, or does not operate at 55 psi and below, or 1/2 the governor cut-out pressure, whichever is less _(verified: appears in the quote below)_
- **Category:** Reject
- **Inspection item number:** 1 _(verified: appears in the quote below)_
- **Defect reference:** f. _(verified: appears in the quote below)_
- **Inspection item:** Brake System
- **Authority:** US 49 CFR Appendix A to Part 396 _(our reading, not quoted from the source)_

## What the source says

> f. Low Pressure Warning Device missing, inoperative, or does not operate at 55 psi and below, or 1/2 the governor cut-out pressure, whichever is less.

## Source

- https://www.law.cornell.edu/cfr/text/49/appendix-A_to_part_396

Last verified: 2026-08-06. Review by: 2027-02-02.
Part of [Vehicle inspection defect categories: MOT major, minor and dangerous verdicts](https://referencesource.org/vehicle-inspection-defect-categories/).