Reductant Purge Control Valve A Performance

Where it lives

For P20A1, the description names the valve as the part involved.

Check these first

• A clogged or stuck reductant purge control valve A
• Blocked reductant lines or nozzles feeding purge valve A
• Corrosion or damage in the purge valve A control wiring
• Contaminated reductant in the system
• A failing reductant level sensor

What to do next

1. Inspect and clean the reductant lines and nozzles
2. Test the purge valve A control circuit for opens and shorts
3. Command reductant purge control valve A with a scan tool
4. Check the reductant level sensor reading
5. Replace reductant purge control valve A if it does not move
6. Clear the code and retest

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