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C1391 on TOYOTA AVALON

Brake actuator accumulator pressure leak or ABS actuator fault

NHTSA Reports
1
Severity
High
Most Affected
2015
Crashes / Fires
0 / 0
Source: NHTSA Complaints Database · SAE J2012
Last reviewed: Last updated:

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 AVALON

C1391 on Toyota Avalon points to brake actuator accumulator pressure leak or abs actuator fault. FixIt matched 1 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.

1 Toyota Avalon owners have reported this code/reference in NHTSA complaints across 2015-2015. Toyota owners most often report C1391 with brake, ABS, traction-control, or accumulator/actuator warnings.

Real TOYOTA AVALON Owner Reports

Source: NHTSA Complaints Database

"THE AVALON HYBRIDS COVERED ONLY BY WARRANTY ENHANCEMENT ZKK ARE SUFFERING THE SAME DANGERS AND FVMSS NONCOMPLIANCE DUE TO BRAKE BOOSTER PUMP ASSEMBLY FAILURES AS THOSE TOYOTA COVERED BY SAFETY RECALLS (D0H & K0L). BY EXCLUDING AVALON HYBRIDS WITH DEFECTIVE BRAKES FROM THE D0H AND K0L SAFETY RECALLS, TOYOTA IS LEAVING T"

— 2015 TOYOTA AVALON owner · VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES · Filed 09/18/2019

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1
'15

Common Causes on TOYOTA AVALON

Based on NHTSA complaint component analysis for this vehicle.

VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES 100%

What To Do Next

  1. 1
    Check for recalls on YOUR VIN

    Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.

  2. 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.

  3. 3
    Compare repair quotes

    Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does C1391 mean on a Toyota Avalon? ▾
It points to brake actuator accumulator pressure leak or abs actuator fault. FixIt found 1 NHTSA reports for this exact code/vehicle pair, so confirm with an enhanced scan and the OEM service procedure.
What are common symptoms of C1391 on Toyota Avalon? ▾
ABS, brake, traction-control, or stability-control warning lights; Longer brake pedal travel or reduced brake assist; Brake actuator or pump running more often than normal.
What should I do first for C1391? ▾
Scan the ABS/brake-control module, not only the powertrain module. Then inspect wiring/connectors, verify voltage/ground, and check VIN-specific recalls or campaigns where applicable.

C1391 on Other Vehicles

TOYOTA CAMRY
19 reports
TOYOTA HIGHLANDER
29 reports
TOYOTA PRIUS
218 reports
→ All codes reported on TOYOTA AVALON