DTC P20A1 - Reductant Purge Control Valve Performance
WARNING: This page is about a different car, the 2020 Ford F-550 Super Duty, 2020 Ford F-450 Super Duty, 2020 Ford F-350 Super Duty, 2020 Ford F-250 Super Duty, and 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
DTC DESCRIPTION P20A1 - REDUCTANT PURGE CONTROL VALVE PERFORMANCE
| Description: | The PCM monitors reductant purge valve performance by monitoring the reductant pressure sensor. During a purge cycle, providing that the system pressure meets or exceeds 280 kPa (41 psi), if the system pressure does not drop by at least 230 kPa (33.3 psi), the PCM sets this DTC and shuts down the selective catalytic reduction (SCR) system. | ||
| Possible Causes: |
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| Diagnostic Aids: | Verify the diesel exhaust fluid is full. Fill as necessary. Remove the reductant injector. Pressurize the system using the scan tool and carry out a visual inspection. If there are no external leaks and the reductant injector nozzle is not leaking, clear the DTCs and repeat the self-test. If DTC P20A1 is retrieved again, install a new reductant pump assembly. |
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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. | ||