DTC codes / U06xx · Network communication / U0612
The U0612 code indicates that the powertrain control module (PCM) has lost communication with the intake air temperature (IAT) sensor 1 on bank 2 of the engine. The PCM monitors the sensor's data circuit and sets this code when it fails to receive a valid signal for a calibrated period, often due to an open circuit, short, or faulty sensor.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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