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 B1000: Control Module Internal Fault (Except IPM): Description
An internal fault detection is handled inside a control module. No external circuits are involved. A control module runs a program to detect an internal fault when power up is commanded with voltage and ground for module present. This program runs even if voltage is out of valid operating range. When a module sets DTC B1000, it will refuse all inputs. A history DTC clears when a control module ignition cycle counter reaches reset threshold, without a repeat of malfunction.
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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.