Fault code: EMS 1064 SCANIA

Error identification:

The voltage in the circuit has been outside the permitted range.

Cause:

Open circuit in the temperature sensor circuit before the catalytic converter.

Notes:

The fault results in no reductant or very little reductant being added.

If the voltage is outside the permitted range, the control unit uses a pre-programmed value.

The fault affects the vehicle s emissions of nitrogen oxides (NOx) and the lamp which warns about a high level of contaminants comes on in the instrument cluster. A text message is also displayed in vehicles with NOx monitoring.

Vehicles with NOx monitoring

An active fault code limits the maximum engine torque by approximately 40%.

An active fault code cannot be cleared from the control unit. When the fault has been rectified, the control unit must verify that the fault has been rectified in order for the fault code to become inactive.

Action:

Check the exhaust gas temperature sensor and electrical cables.

Disconnect the sensor and measure the resistance. At a temperature of 10-30°C, the resistance should be 207-222 ohms.

Proceed as follows to verify that the fault has been rectified:

Switch off the power with the starter key, wait for at least 90 seconds and switch on the power with the starter key again.

If the fault is resolved, the fault code becomes inactive. Clear the fault code.

Switch the power off and on with the starter key three times in succession at 10 second intervals to turn off the warning lamp.