C1265: Lamp Warning Relay Circuit Short To Ground

MediumChassisChassis Electronics

What does C1265 mean?

C1265 is a diagnostic trouble code indicating "Lamp Warning Relay Circuit Short To Ground". The ECU is detecting a voltage reading that is below the expected range in the chassis electronics circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.

Common causes

  • Damaged or corroded wiring harness
  • Loose or disconnected electrical connector
  • Failed chassis electronics sensor or actuator
  • Blown fuse in the related circuit
  • Poor ground connection

What should you do?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.

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