C1391 on TOYOTA HIGHLANDER
Brake actuator accumulator pressure leak or ABS actuator fault
Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What C1391 Means on Your TOYOTA HIGHLANDER
C1391 on Toyota Highlander points to brake actuator accumulator pressure leak or abs actuator fault. FixIt matched 29 NHTSA owner reports for this exact code/vehicle pair, so use this page to prioritize the most likely symptoms, components, and next checks before replacing parts.
Real TOYOTA HIGHLANDER Owner Reports
Source: NHTSA Complaints Database
"Two problems being reported are severe safety issues, and could result in injury, death, and/or property damage. Problem 1: While driving, the brake pedal suddenly went all the way to the floor, and the car would not stop. To avoid hitting the car in front at a stop sign, I had to turn the wheel, resulting in running t"
"My electric brake computer thu a code C1256 & C1391, ABS Brake Actuator Failure. Not regular maintenance item. No code ever thrown til this time. Major people killer when it fails. My experience was during a rain storm, lost all brakes for maybe 1-2 seconds. Felt like you were on ice. No control, No ABS. Then code and"
"THE VSC LIGHT, ABS LIGHT, CHECK ENGINE LIGHT AND SOUND IS ARE ON. THE CODE IS BACK AS WELL C1391 FOR THIS BRAKE ACTUATOR. IT IS A WELL KNOWN PROBLEM WITH TOYOTAS . THIS WAS FIXED ONCE ALREADY BY TOYOTA DEALER AND FAILED AFTER 40K MILES AGAIN. HOW CAN A PART HAS FAILED AGAIN IN SUCH A SHORT TIME AND MILES? THIS IS A COM"
"Good Afternoon, The brake actuator and booster pump failed on my 2008 Toyota Highlander Hybrid. ABS, Brake, and VSC warning lights came on, and the brakes became weak and unsafe. A repair shop confirmed the issue with codes C1252, C1256, and C1391. I tried to fix it at a local shop last year, but the problem came back."
"In June 2019, Toyota issued a recall for ABS malfunction, diagnostic code C1391 - brake actuator and accumulator. New parts were issued by Toyota in 2019 as part of the recall. My vehicle experienced ABS malfunction, diagnostic code C1391 in March 2022 and was repaired by Toyota with the new and improved parts issued a"
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on TOYOTA HIGHLANDER
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.