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.
Upshift Indicator Light
ECU controls upshift indicator light, which is found only in vehicles with M/T. Indicator light glows as bulb check when ignition is on with engine not running. Light turns off when engine starts.
Indicator light glows when engine load and speed indicates need for upshift to ECU. If gears are not shifted, ECU will turn light off after 3 to 5 seconds. Switch on transmission keeps light from lighting when transmission is in highest gear.
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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.