C1256 — OBD2 Diagnostic Trouble Code (Toyota)

The accumulator pressure is detected by the Accumulator Pressure Sensor, which is integrated inside the actuator. In the master cylinder solenoid, the Accumulator Pressure Sensor is linked to the Skid Control ECU. The Accumulator Pressure Sensor is monitored by the Skid Control ECU Module. If the Skid Control ECU detects a drop in accumulator pressure, it sets the OBDII code.

Toyota C1256 Possible Causes

1. Faulty accumulator pressure sensor
2. Accumulator pressure sensor harness is open or shorted
3. Accumulator pressure sensor circuit poor electrical connection
4. Faulty skid control ECU

Possible Symptoms

1. Anti-lock Braking System (ABS) Warning Light
2. Engine Light On (or Service Engine Soon Warning Light)