Volvo All Engines (2017 Emissions) Fault Code: P20A900 PID: ACM Reductant Injection Air Pressure Control Valve Circuit High
Volvo All Engines (2017 Emissions) Fault Code: P20A900 PID: ACM Reductant Injection Air Pressure Control Valve Circuit High
Conditions for diagnostic trouble code (DTC)
The voltage at pin A174.A:21 is above normal value
Diagnostic operating conditions
Ignition key in ON position
Observable symptoms
Uncontrolled air consumption
Probable cause
1) Short circuit to higher voltage
2) Connector
3) Wiring harness
4) Actuator
5) Aftertreatment Control Module (ACM)
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