If the C1201 code is combined with an Oxygen (O2) Sensor or Air Fuel (A/F) Ratio Sensor code, repair the O2 Sensor or A/F Sensor code first and clear the codes.
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 C1201 Scion 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.
If a malfunction in the engine control system is detected through the Control Area Network (CAN), the operations of Vehicle Stability Control (VSC) and Traction Control (TRAC) are prohibited by the fail-safe function. When the signals from the engine are input normally, the fail-safe is canceled, and the Diagnostic Trouble Code (DTC) is stored. The DTC will be set when the engine control system malfunction signal continues for 1 second or more.
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