2015 Toyota Highlander Repair Guides
P08152015 Toyota Highlander P0815 — Overdrive Off Switch Circuit Diagnosis & Fix
P0815 indicates an issue with the overdrive cancel switch, affecting fuel economy and transmission wear.
Easy
30 min-1 hour
P08262015 Toyota Highlander P0826 — 4WD Mode Switch Circuit Diagnosis & Fix
The four-wheel drive mode switch circuit is indicating abnormal readings.
Moderate
1-2 hours
P08382015 Toyota Highlander P0838 — 4WD Switch Circuit Low Input Diagnosis & Fix
P0838 indicates abnormally low voltage at the 4WD switch input.
Moderate
1-2 hours
P08642015 Toyota Highlander P0864 — TCM Signal Performance Problem Diagnosis & Fix
The TCM is receiving signals outside expected performance parameters.
Advanced
2-4 hours
P17892015 Toyota Highlander P1789 — Transmission Switch Battery Feed Fault Diagnosis & Fix
Learn how to diagnose and fix OBD-II trouble code P1789 (Transmission switch power fault) in your 2015 Toyota Highlander. Step-by-step repair guide with troubleshooting tips.
Moderate
30-60 minutes