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 P100C: General Description
The EVTS line and the EVTM line of the powertrain control module (PCM) receive the electric VTC motor revolution speed and the electric VTC motor revolution direction data and output pulses accordingly. The EVTM outputs the same pulse as the EVTS when the electric VTC motor revolution direction is normal and outputs reverse pulse of the EVTS when reversing. The PCM detects a malfunction and stores a DTC when the EVTS pulse number and the EVTD pulse number sent from the electric VTC motor are different continuously for the prescribed time.
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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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