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Code P0499 on Jeep Liberty stands for a shorted high condition detected in NVLD solenoid circuit. This indicates there could be a leak in the vacuum system. The sensors can at times trigger this code although no leak is present. Try disconnecting the battery for a few minutes and see of the code comes up. If the code reappears, the pump will most will most likely have to be replaced.

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∙ 13y ago
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