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 U2016: Control Module Main Software: Description
When the battery voltage to the PSCM is greater than 10 volts with the ignition ON and there are no DTCs present, the PSCM runs a self-test of the system software. If an error is detected, a DTC is set and the EPAS enters into a limited operation mode.
- DTC U2016:09 (Control Module Main Software: Component Failure) - Sets due to an internal failure in the PSCM software.
- DTC U2016:47 (Control Module Main Software: Watchdog/Safety Micocontroller Failure) - Sets due to an internal failure in the PSCM software.
- DTC U2016:48 (Control Module Main Software: Supervision Software Failure) - Sets due to an internal failure in the PSCM software.
- DTC U2016:57 (Control Module Main Software: Invalid/Incompatible Software Component) - Sets due to an internal failure in the PSCM software.
- DTC U2016:66 (Control Module Main Software: Signal Has Too Many Transitions/Events) - Sets due to an internal failure in the PSCM software.
- DTC U2016:94 (Control Module Main Software: Unexpected Operation) - Sets due to an internal failure in the PSCM software.
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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.