DTC P20A5 - REDUCTANT Purge Control Valve A Stuck Closed
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P20A5 - REDUCTANT PURGE CONTROL VALVE A STUCK CLOSED
| Description: | The reductant dosage control module monitors the system pressure during a purge cycle to make sure the pressure is decreasing. This DTC sets when the system pressure increases during a purge cycle, indicating the reductant purge valve is stuck closed. | ||
| Possible Causes: |
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| Diagnostic Aids: | Clear the RDCM and PCM DTCs. Carry out a drive cycle. Refer to DRIVE CYCLES . If this DTC sets again, install a new reductant pump assembly. Refer to the appropriate Engine Emission Control article. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the DTC. | ||