What causes B1078 on a Honda?

Faulty Daytime Running Lights Relay Daytime Running Lights Relay harness is open or shorted Daytime Running Lights Relay circuit poor electrical connection Faulty Body Control Module (BCM) Failed daytime running lights relay

How do I fix B1078 on a Honda?

Confirm the code with a scan tool and check the daytime running lights relay and fuses Inspect the relay, the switch, and the connectors for corrosion and loose pins Test the control signal and relay operation with a multimeter Repair any open or shorted wiring before replacing parts Replace the relay or switch that fails testing, then clear codes and retest

B1078 The body control module saw an out of range daytime running lights signal

Q: What does B1078 mean on a Honda?

B1078. The body control module saw an out of range daytime running lights signal. The daytime running lights may not come on. Applies to Honda and Acura models that use this code.

Category: Body
Severity: Body Warning Light
Applies to: Honda and Acura models that use this code

What does B1078 mean on a Honda?

B1078. The body control module saw an out of range daytime running lights signal. The daytime running lights may not come on. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1078

Faulty Daytime Running Lights Relay
Daytime Running Lights Relay harness is open or shorted
Daytime Running Lights Relay circuit poor electrical connection
Faulty Body Control Module (BCM)
Failed daytime running lights relay

How to fix B1078

Confirm the code with a scan tool and check the daytime running lights relay and fuses
Inspect the relay, the switch, and the connectors for corrosion and loose pins
Test the control signal and relay operation with a multimeter
Repair any open or shorted wiring before replacing parts
Replace the relay or switch that fails testing, then clear codes and retest

Sources and review

Last updated 2026-09-26.