Exhaust Aftertreatment Fuel Injector A Stuck Closed

Where it lives

For P20D0, the description names the injector as the part involved.

Check these first

• A clogged exhaust aftertreatment fuel injector A
• A failed exhaust aftertreatment fuel injector A
• A restriction in the aftertreatment fuel supply
• Corrosion at the injector A connector

What to do next

1. Command exhaust aftertreatment fuel injector A on a scan tool
2. Check for a restriction in the aftertreatment fuel supply
3. Test the injector A control circuit
4. Replace exhaust aftertreatment fuel injector A if it will not open
5. Clear the code and retest

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