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.
Mode V (Test Mode)
Mode V represents a real-time diagnostic test of the crank angle sensor, ignition signal, airflow output signal and fuel pump. This mode is accessed for an in-bay running test of the vehicle. The Red and Green LEDs must be monitored carefully during this test, with special attention paid to the number of flashes before each pause.
The malfunction code will be displayed only once and will not be stored in memory. If Red LED blinks on and off evenly, this indicates a fault in the crank angle sensor. If the Red LED flashes twice before a pause, this indicates a fault in the airflow meter. If the Red LED blinks 3 times before a pause, this indicates a fault in the fuel pump circuit. If the Red LED blinks 4 times before a pause, this indicates a fault in the ignition signal.
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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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