Acura B1158: Gauge Control Module Lost Communication with Relay Control Module (RM Message)

Is your scanner showing Acura B1158?
No worries. We'll show you what it means and how to deal with it.

Presented by

Randy Worner

00:00/00:00

Acura B1158: Gauge Control Module Lost Communication with Relay Control Module (RM Message)

OVERVIEW

Severity

Medium

DIY Difficulty Level

Intermediate

Repair Cost

$75-$200

Can I Still Drive?

Yes (Short-term only)

What Does The Acura B1158 Code Mean?

This code indicates poor communication between the Gauge Control Module and the Relay Control Module.

Note: If DTCs B1005, B1959, B2162, and/or B2970 are also indicated, perform the Relay Control Module input test. If no additional codes are present, perform the Gauge Control Module input test.

What Are The Potential Causes Of The Acura B1158 Code?

Below are some possible causes of this DTC:

Loose or poor connections between the Gauge Control Module and the Relay Control Module
Blown fuse in the main under-hood fuse box
Blown fuse in the under-dash fuse/relay box
“Open” or “Short” to ground at the Gauge Control Module
“Open” or “Short” to ground at the Relay Control Module
Faulty Gauge Control Module
Faulty Relay Control Module