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.
Diagnostic Trouble Code (DTC) Information ICM-1A57
Condition
The infotainment control module (ICM) checks the communication with the phone module (PHM).
The diagnostic trouble code (DTC) is stored if the infotainment control module (ICM) registers a fault in the communication with the phone module (PHM).
The diagnostic trouble code (DTC) can be diagnosed with the ignition on and the battery voltage above 11 V.
Substitute Value
- None.
Possible Source
- Internal fault in the phone module (PHM)
- No phone module (PHM).
Fault symptom[s]
- The carphone is not working.
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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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