Check code 12

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Check code 12
WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
CHECK CODE 12 DIAGNOSTIC PROCEDURES

Check code 12 Speedometer display signal
INSPECTION CONDITION DISPLAY ACTION
Select check code 12. oo All segments in the speedometer illuminate. The speedometer is normal.
Except above Replace the instrument cluster.
Err -
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.