Error code · ABS and chassis

C1256 — Brakes: accumulator low pressure malfunction

Stop driving

For makes: Toyota, Lexus

Open this code in the appDownload the app

A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.

Possible causes

What you can do yourself

  1. If the brake pedal has become hard, soft or sinks, or the car brakes worse — don’t drive, call a tow truck.
  2. Check the brake fluid level in the reservoir.

A code of brakes with a pump and a hydraulic accumulator (as given in the 4Runner 1996–2002 manual and Toyota bulletins for the Prius and Highlander Hybrid). This is the Toyota and Lexus meaning. On other makes this number means something else: if your car isn’t a Toyota or Lexus, change the make at the top.

Source: Toyota 4Runner 1996–2002 repair manual; Toyota T-SB-0032-16, T-SB-0079-18 (static.nhtsa.gov)

The explanation comes from the error code reference in the AvtoElektrik PRO app.

Need a mechanic’s help?

Couldn’t fix it yourself? Oleg, an auto electrician, does computer diagnostics and repairs: he comes out anywhere in Almaty or sees you at his workshop.

Car computer diagnostics in AlmatyCall: +7 701 121 11 10

Want to figure it out yourself?

Oleg’s course “Car computer diagnostics with a scan tool”: how to hook up a scanner, read codes and live data, and use them to find the cause. The first lessons are free.

Scan tool diagnostics course →

Nearby codes

All codes in C07xx–C24xx →

Who keeps this reference

The reference is kept by Oleg Dmitriev, an auto electrician from Almaty with 26 years of experience: computer diagnostics of cars and trucks, repair of control units (ECUs). Can’t find the cause? Message him.

Oleg’s auto electrician websiteWhatsApp +7 701 121 11 10