Volvo All Engines (2017 Emissions) Fault Code: P203900 PID: ACM Reductant Injection Air Pressure Sensor “A”
Volvo All Engines (2017 Emissions) Fault Code: P203900 PID: ACM Reductant Injection Air Pressure Sensor “A”
Conditions for diagnostic trouble code (DTC)
The voltage at pin A174.A:47 is less than 0.15 V
Diagnostic operating conditions
Ignition key in ON position
Observable symptoms
Uncontrolled air consumption
Probable cause
1) Connector
2) Short circuit to ground
3) Faulty sensor
5) Wiring harness
6) Aftertreatment Control Module (ACM)
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