OBD
P0490
EGR A Control Circuit High
What it means
P0490 means EGR A Control Circuit High.
Check these first
- A short to power in the EGR A control circuit
- A failed EGR A control solenoid
- A chafed EGR A control wire
- A faulty PCM driver
What to do next
- Check the EGR A control circuit for a short to power
- Measure the EGR A solenoid resistance
- Inspect the EGR A control wire for chafing
- Replace the EGR A solenoid if the circuit is shorted to power
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.