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 Trouble Codes (DTCs)
When a fault occurs it is stored in the control module as a DTC (Diagnostic Trouble Code) provided the car's road speed is over 35 km/h (22 mph) for at least 15 seconds.
The DTCs can be stored in the control module's memory only if the ignition is turned on. When the ignition is switched off these diagnostic trouble codes (DTCs) are erased. For the control module to detect DTCs again the car's road speed must be over 35 km/h (22 mph) for at least 15 seconds.
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.
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