2021 Toyota Highlander Repair Guides

P06372021 Toyota Highlander P0637 — Power Steering Control Circuit High Diagnosis & Fix

Complete guide to diagnosing and fixing the P0637 (Power Steering Control Circuit High) error code on your 2021 Toyota Highlander. Includes step-by-step instructions, repair costs, and expert tips.

Easy

1-2 hours

P06472021 Toyota Highlander P0647 — A/C Compressor Clutch Control Circuit High Diagnosis & Fix

Complete guide to diagnosing and fixing the P0647 (A/C Compressor Clutch Control Circuit High) error code on your 2021 Toyota Highlander. Includes step-by-step instructions, repair costs, and expert tips.

Easy

1-2 hours

P08192021 Toyota Highlander P0819 — Upshift Blocked Due to Temperature Diagnosis & Fix

The TCM is preventing upshifts to protect the clutch from heat damage.

Advanced

1-2 hours

P08362021 Toyota Highlander P0836 — 4WD Switch Circuit Malfunction Diagnosis & Fix

P0836 indicates a fault in the 4WD mode selection switch circuit.

Moderate

1-2 hours

P08482021 Toyota Highlander P0848 — Brake Booster Pressure Sensor High Diagnosis & Fix

P0848 indicates abnormally high pressure reading from the brake booster sensor.

Advanced

1-3 hours

P08862021 Toyota Highlander P0886 — TCM Power Relay Control Low Diagnosis & Fix

P0886 indicates abnormally low voltage in the TCM power relay control.

Advanced

1-3 hours

P11512021 Toyota Highlander P1151 - AIR FUEL RATIO SENSOR CIRCUIT Diagnosis & Fix

Expert diagnosis and repair guide for P1151 (Air-fuel ratio sensor circuit malfunction) in 2021 Toyota Highlander. Includes wiring checks, sensor testing, and module communication diagnostics.

Moderate

1-3 hours

P11972021 Toyota Highlander P1197 - FUEL DELIVERY SYSTEM PERFORMANCE Diagnosis & Fix

Expert diagnosis and repair guide for P1197 (Fuel delivery system performance problem) in 2021 Toyota Highlander. Includes wiring checks, sensor testing, and module communication diagnostics.

Advanced

3-5 hours

P17952021 Toyota Highlander P1795 — Manufacturer Specific Clutch Adaptation Fault Diagnosis & Fix

Learn how to diagnose and fix OBD-II trouble code P1795 (Make-specific adaptation code) in your 2021 Toyota Highlander. Step-by-step repair guide with troubleshooting tips.

Moderate

2-4 hours