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To fix a high idle in park condition on your 99 Saturn SL2 with a DOHC 1.9L engine, you can try cleaning the throttle body, checking for vacuum leaks, and inspecting the idle air control valve for proper operation. If these steps don't resolve the issue, it may be a problem with the throttle position sensor or engine control module that requires further diagnosis by a mechanic.

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1y ago

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