Fault code: 4356 SCANIA

Error identification:

The signal from rotational speed sensor T74 has indicated an implausible rotational speed increase between two subsequent pulses.

Cause:

The fault may arise if the polarity of the two engine speed sensors is reversed.

The fault code may be generated when starting in extremely cold weather or with a poor battery.

Notes:

If fault code 4359 has been generated at the same time, then the signal must have been absent for several engine rotations, otherwise the fault is due to a temporary disturbance.

If only one of the rotational speed sensors is faulty, the maximum engine torque is reduced by 30% as long as the fault is active. In addition, the engine s high idle speed is lower than usual.

If both rotational speed sensors are faulty, the engine will shut down.

Action:

Check the rotational speed sensors, harness-to-harness connectors and electrical cables.

Check the battery voltage.