B154B 2018 Chevrolet Silverado Code - Passenger Mirror Internal Malfunction
Quick Answer
The outside mirror switch and passenger window switch are on a serial data circuit with the memory seat module as the master. Common causes include Faulty Passenger Outside Rearview Mirror Motor, Passenger Outside Rearview Mirror Motor harness is open or shorted, Passenger Outside Rearview Mirror Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B154B 2018 Chevrolet Silverado indicates Passenger Mirror Internal Malfunction.
- Common causes
- Common causes include Faulty Passenger Outside Rearview Mirror Motor, Passenger Outside Rearview Mirror Motor harness is open or shorted, Passenger Outside Rearview Mirror Motor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B154B 2018 Chevrolet Silverado Description
Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The outside mirror switch and passenger window switch supply a 5 V reference, low reference, and horizontal and vertical position signal circuits to these sensors. The signal circuits are referenced from 5 V by the switches and the signal circuit voltage levels represent the mirror positions. The mirror positions are sent to the memory seat module through the serial data circuit where they are stored for memory mirror operation. When the memory seat module receives a memory recall command, the memory seat module will send the go to position commands to the outside mirror switch and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.
The Diagnostic Trouble Code (DTC) will be set when an internal malfunction has been detected by the passenger window switch while commanding the passenger outside rearview mirror UP, DOWN, LEFT, or RIGHT.
What are the Possible Causes of the DTC B154B 2018 Chevrolet Silverado?
- Faulty Passenger Outside Rearview Mirror Motor
- Passenger Outside Rearview Mirror Motor harness is open or shorted
- Passenger Outside Rearview Mirror Motor circuit poor electrical connection
How to Fix the DTC B154B 2018 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B154B 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B154B 2018 Chevrolet Silverado code?
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Frequently Asked Questions about B154B 2018 Chevrolet Silverado Code
1. What does OBDII code B154B mean on a 2018 Chevrolet Silverado?
Code B154B indicates a "Passenger Mirror Internal Malfunction," meaning there is an issue with the internal components or circuitry of the passenger-side mirror.
2. What are the common symptoms of code B154B in a 2018 Chevrolet Silverado?
Symptoms may include the passenger-side mirror not adjusting properly, unresponsive mirror controls, or the mirror folding mechanism failing.
3. What causes the B154B code to trigger?
Common causes include a faulty mirror motor, damaged wiring, a defective mirror control module, or corrosion within the mirror assembly.
4. Can I still drive my 2018 Chevrolet Silverado with code B154B?
Yes, the vehicle is still drivable, but the passenger mirror functionality may be limited or inoperative, affecting visibility and convenience.
5. How can I diagnose the B154B code on my Silverado?
Start by visually inspecting the mirror and wiring for damage or corrosion. Use a scan tool to check for related codes and test the mirror control circuit for proper voltage and continuity.
6. Is the passenger mirror assembly the only part that may need replacement?
Not necessarily. Depending on the diagnosis, the issue could be with the mirror motor, control module, or wiring instead of the entire mirror assembly.
7. How much does it cost to fix the B154B code on a 2018 Chevrolet Silverado?
Repair costs vary, but replacing the mirror assembly can range from $200 to $500, including parts and labor. Wiring or module repairs may cost less.
8. Can I fix the B154B code on my Silverado myself?
If you’re comfortable with basic electrical troubleshooting and have the necessary tools, you can inspect and replace damaged components. However, professional assistance may be required for complex issues.
9. Will clearing the code with a scan tool fix the problem?
Clearing the code will not fix the underlying issue. The mirror malfunction must be repaired to prevent the code from returning.
10. Could a software update resolve code B154B on my Silverado?
In rare cases, a software update for the vehicle’s control modules could address the issue. However, this is unlikely and generally applies only if recommended by the manufacturer.
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