C1581 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1581 – Assist Map Number Un-Writing
C1581 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1581 Possible Causes
Faulty Power Steering ECU,Power Steering ECU harness is open or shorted,Power Steering ECU circuit poor electrical connection
The Power Steering ECU assy outputs this Diagnostic Trouble Code (DTC) when it determines that assist map is not written in the ECU. It is necessary to replace the Power Steering ECU assy when this code is output because this malfunction cannot be repaired.