SOURCE: hyundai elantra reading these codes its an 05 car
ZERO out your ECM (wipe out all 'adaptives'). disconnect both battery post connectors and tough them together for 30 seconds. Afterward, reconnect them to the battery... see what happens
SOURCE: P1505 / P1507 code on check engine light
Definitely an "Ilde Speed Control' actuator problem... drivability is up to you.
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