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The error code c2318 on the Toyota Prius indicates a problem with low voltage or insufficient power supply in the vehicle. Possible causes of this issue include a faulty auxiliary battery, IGCT relay, HEV fuse, or a short in the auxiliary battery or wiring harness. A mechanic will inspect the Prius for faulty connector pins, wiring issues, and electrical connections. Fixing the problem may require replacing the battery, which typically costs between $250 and $300 without installation costs. Diagnosing the error itself could take about an hour of labor, with a cost ranging from $75 to $100. Signs that the error may be present include the "check engine" or ABS brake light appearing on the dashboard, as well as potential difficulties when starting the engine.
The code C2318 for the Toyota Prius indicates a problem with low voltage.