Scania fault code 4173
Code 4173 is used by 6 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Exhaust gas temperature sensor upstream of SCR catalytic converter T113
Implausible signal in T158 1, Temperature sensor at silencer intake. The value is higher than the calculated temperature.
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EMU
Heater H39, communication error
CAN communication does not work.
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EMD
Exhaust gas temperature sensor upstream of SCR catalytic converter T113
Implausible signal from exhaust gas temperature sensor T113 upstream of the SCR catalytic converter. The value is higher than the calculated temperature.
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EME
Exhaust temperature sensor, temperature too high
Implausible signal from exhaust gas temperature sensor upstream of SCR catalytic converter T158. The value is higher than the calculated temperature. Implausible signal from exhaus…
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EMO
Exhaust gas temperature sensor upstream of SCR catalytic converter T113
Exhaust gas temperature sensors before the SCR catalyst (T158) signal is not plausible. The value is much higher than the calculated temperatureExhaust gas temperature sensors befo…
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DDU
Tweeter on right-hand A-pillar panel, break in circuit
The DDU control unit interprets a break in the circuit for the tweeter on the right-hand A-pillar panel.
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