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Trying to find out cause of OBD code C1242

Vehicle: 2005 Toyota Prius unknown

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C1242 IG1/IG2 Power source circuit

Can changing the oil , or needing a oil change cause this code, More than likely ,no, this would be more of a power voltage drop which would be temporary. Have the 12 volt car battery check  going weak can also set this code.

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