Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC U1205: IMA-CAN Malfunction (Powertrain Control Module (PCM)-Motor Control Module (MCM)): General Description
The integrated motor assist-controller area network (IMA-CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (IMACAN H and IMACAN L). When the information is not sent from the motor control module (MCM) via the IMA-CAN lines and this condition continues for a specified time or when the information sent from the MCM is abnormal and this condition continues for a specified cycle, the powertrain control module (PCM) detects a malfunction and stores a DTC.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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