The vehicle displays two specific fault codes in the control unit integrated into the steering column:
B1012 – Steering wheel angle sensor not calibrated.
B1020 – Steering wheel angle sensor. Functioning or limit value problem.
The fault indicator light for the stability control system (ESP) is on on the instrument panel when driving the vehicle.
The warning indicator light for the electro-hydraulic steering system (EHPS) is on on the instrument panel.
The indicator light stalk may malfunction, it does not return to its initial position.
The cause of this fault is nothing more than a internal failure of the steering angle sensor (SAS), which is located inside the control unit (CIM) integrated in the electro-hydraulic power steering column (EHPS system). Unfortunately, due to the soldering of the sensor in the unit, it is not possible to repair it separately to reduce the cost of the fault repair, the complete module (CIM) must be replaced with an up-to-date version.