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.
Self-Diagnostic System: Notes
If a malfunction occurs in a system monitored by the Body Control Module (BCM), the BCM stores a Diagnostic Trouble Code (DTC) in memory. DTCs are stored as either a current or a history codes. A current DTC means the fault was present when diagnostic mode was entered. A history DTC means the fault occurred sometime after DTCs were last cleared from memory. DTCs are displayed as flash codes through security indicator lamp on instrument cluster.
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.