Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the C1805 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
When the ignition is turned to the RUN position, the Anti-Lock Brake System (ABS) Module and the Powertrain Control Module (PCM) share Vehicle Identification Number (VIN) information over the High Speed Controller Area Network (HS-CAN) bus. If the VIN information stored in the ABS module does not match the information transmitted by the PCM, DTC C1805 will set.
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