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 Aids
DTC B1004 may be stored as history without affecting operation of control module. If stored only as a history DTC and not retrieved as current, DO NOT replace control module. If this DTC is retrieved as a current DTC, replace control module. DTC B1004 will never set as current during testing unless there is a non-recoverable memory failure. Intermittent interruptions to a module voltage supply circuit or ground circuit will cause DTC B1004 to set.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.