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P0400 code

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Old Mar 6, 2026 | 09:58 PM
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Default P0400 code

Got a P0400 code confirmed erg valve is good (holds vacuum), vacuum line’s themselves are good and Solenoid is good from just a 9v and alligator clip test(along with making sure it holds vacuum). Also made sure tube and valve openings are clear. Cleaned valve with throttle body cleaner and code still reappeared. Any suggestions?
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