Engine-Codes - Generic - B123E

B123E Code - Radio Keypad Button Signal Circuit

- Code Popularity: 1,819 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code B123E?

  • Faulty Radio Controls
  • Radio Controls harness is open or shorted
  • Radio Controls circuit poor electrical connection
  • Faulty Radio

How to Fix the B123E Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the Cost to Diagnose the Code B123E?

Labor: 1.0

The cost to diagnose the B123E code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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What are Code B123E Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B123E Code Mean?

The radio controls communicate radio control inputs directly to the radio through a discrete circuit for volume up, volume down, and power button. It also uses a series of resistors through a signal circuit when the home, seek up, seek down and phone buttons are pressed. After receiving the message, the radio will perform the requested function. Messages communicated between the radio and the radio controls include the following: Button presses/knob rotations, Commands for the state of indicators, and Controls back-lighting. The Diagnostic Trouble Code (DTC) will be set when the radio detects an open/high resistance, short to voltage, or short to ground on the radio controls key signal circuit.

B123E Code - Radio Keypad Button Signal Circuit

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Code B123E Information for Specific Makes

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