2021 Toyota Prius Repair Guides

B0037[2021] Toyota Prius B0037 — Airbag Diagnostic Monitor Circuit Diagnosis & Fix

Complete diagnostic and repair guide for B0037 (airbag-diagnostic-monitor-circuit) on 2021 Toyota Prius. Learn symptoms, causes, and step-by-step repair procedures.

Easy

30-60 minutes

B0129[2021] Toyota Prius B0129 — Ac System Overpressure Diagnosis & Fix

Complete diagnostic and repair guide for B0129 (ac-system-overpressure) on 2021 Toyota Prius. Learn symptoms, causes, and step-by-step repair procedures.

Easy

30-60 minutes

P05042021 Toyota Prius P0504 — Brake Switch A Circuit Malfunction Diagnosis & Fix

Complete guide to diagnosing and fixing the P0504 (Brake Switch A Circuit Malfunction) error code on your 2021 Toyota Prius. Includes step-by-step instructions, repair costs, and expert tips.

Moderate

2-3 hours

P08302021 Toyota Prius P0830 — 4WD Transfer Case Encoder Circuit Diagnosis & Fix

The transfer case position encoder circuit is malfunctioning, preventing proper 4WD engagement.

Advanced

2-4 hours

P08782021 Toyota Prius P0878 — Transmission Fluid Pressure Performance Diagnosis & Fix

P0878 indicates transmission fluid pressure is not matching TCM commands.

Advanced

2-4 hours

P08872021 Toyota Prius P0887 — TCM Power Relay Control High Diagnosis & Fix

The TCM power relay control circuit is showing abnormally high voltage.

Advanced

1-3 hours

P08922021 Toyota Prius P0892 — TCM Power Relay Sense Intermittent Diagnosis & Fix

P0892 indicates intermittent TCM power relay sense signal.

Advanced

1-3 hours