Volvo All Engines (2010 Emissions) Fault Code: SPN 1074 FMI 5 PID: Engine (Exhaust) Brake Output

Conditions for diagnostic trouble code (DTC):
1) Current below normal or open circuit

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) The exhaust brake does not function
2) Low Power

Probable cause
1) Open circuit between air valve unit control valve and engine control module (ECM)
2) Open circuit on supply wire to air valve unit
3) Open circuit in air valve unit control valve

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