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Code 19

Yamaha Motorcycle

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Yamaha Motorcycle Code 19 — Sidestand Switch

What it means

Yamaha motorcycle blink code 19 means the sidestand (kickstand) switch is sending an incorrect or out-of-range signal to the ECU.
The switch may be dirty, faulty, or stuck — clean it first before replacing.

Affected Models

  • Yamaha YZF-R Series
  • Yamaha MT Series
  • Yamaha FZ Series
  • Yamaha XSR Series
  • Yamaha Tenere
  • Yamaha TMAX Scooter

Common Causes

  • Dirty or corroded sidestand switch contacts
  • Faulty sidestand switch
  • Sidestand switch connector corroded or loose
  • Damaged sidestand switch from a tip-over
  • Wiring harness damage near the sidestand pivot

How to Fix It

  1. Clean the sidestand switch.

    The sidestand switch is exposed to road grime, mud, and water.
    Locate the switch at the sidestand pivot point on the left side of the frame, spray with contact cleaner, and work the sidestand up and down several times to free the switch contacts.

  2. Check the switch connector.

    Trace the wire from the switch up to its connector (usually near the frame or under the fuel tank edge).
    Inspect for corrosion, bent pins, or moisture inside the connector.
    Clean and reconnect firmly.

  3. Test the switch with a multimeter.

    With sidestand UP: switch should show continuity (closed circuit).
    With sidestand DOWN: switch should show no continuity (open circuit).
    If the readings are reversed or unchanged in both positions, the switch has failed.

  4. Replace the sidestand switch.

    Yamaha sidestand switches cost $15–$40 and are held by a single screw on most models.
    Route the replacement wire the same way as the original and connect the wiring correctly.

When to Call a Professional

Sidestand switch replacement is an easy DIY repair on most Yamaha models — the switch is at the sidestand pivot and typically held by one screw.
If the switch is replaced but Code 19 persists, the wiring from the switch to the ECU has a fault.

Frequently Asked Questions

Yamaha engine cuts out while riding and shows Code 19 — is that the sidestand?

Yes — if the sidestand switch is faulty and signals that the stand is down while you are riding, the safety circuit may cut the engine. This is a genuine safety feature preventing riding with the stand down. Clean or replace the switch to resolve the issue.

Yamaha will not start and shows Code 19 with the sidestand fully retracted — what is wrong?

If Code 19 appears with the stand up, the switch is stuck in the wrong position — it is telling the ECU the stand is down even though it is retracted. Clean the switch contacts first. If Code 19 persists after cleaning, the switch has failed internally and needs replacing.