AutoCodes – Chevrolet – B3147 Chevrolet

B3147 Chevrolet Code - Right Front Unlock Switch Circuit Low

Quick Answer

The switch that failed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA) or the Passenger Front Door Module (PDM). Common causes include Faulty Right Front Power Door Lock Switch, Right Front Power Door Lock Switch harness is open or shorted, Right Front Power Door Lock Switch 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: B3147 Chevrolet indicates Right Front Unlock Switch Circuit Low.
Common causes: Common causes include Faulty Right Front Power Door Lock Switch, Right Front Power Door Lock Switch harness is open or shorted, Right Front Power Door Lock Switch 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.

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Code Popularity 773

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3147 Chevrolet Description

The switch that failed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA) or the Passenger Front Door Module (PDM). When a door lock switch is activated to the Lock or Unlock function, the DDSA or PDM receives the switch input and sends the information on, via the Serial Data Class 2 communications line, to the Rear Integration Module (RIM), which is the master of all lock operations. If the RIM determines that the message is a valid request and conditions are correct for a door lock function to occur, it sends its OK back to all the door modules to Lock or Unlock the doors. Each door module supplies power and ground to its associated lock actuator to Lock or Unlock the associated door.

OBDII Code B3147 Chevrolet - Right Front Unlock Switch Circuit Low - AutoCodes.com — B3147 Chevrolet Code - Right Front Unlock Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3147 Chevrolet?

Faulty Right Front Power Door Lock Switch
Right Front Power Door Lock Switch harness is open or shorted
Right Front Power Door Lock Switch circuit poor electrical connection
Faulty Passenger Front Door Module (PDM)

How to Fix the DTC B3147 Chevrolet?

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 B3147 Chevrolet 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.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B3147 Chevrolet Code

1. What does the OBDII code B3147 mean on a Chevrolet?

B3147 indicates a problem with the right front door unlock switch circuit, specifically a low voltage condition.

2. What are the common symptoms of the B3147 code?

Symptoms may include the right front door not unlocking, issues with the keyless entry system, or no response from the door unlock switch.

3. What causes the B3147 code to appear?

The code can be caused by a damaged or faulty unlock switch, broken wiring, a poor electrical connection, or a malfunctioning body control module (BCM).

4. Can a blown fuse cause the B3147 code?

Yes, a blown fuse in the circuit related to the door unlock system can trigger the B3147 code.

5. How do I diagnose the B3147 code on my Chevrolet?

Start by inspecting the right front door unlock switch, wiring, and connectors for damage or loose connections. Use a multimeter to check for proper voltage and continuity in the circuit.

6. Is it safe to drive with the B3147 code active?

Yes, the vehicle is typically safe to drive, but you may experience inconvenience with door lock functionality.

7. How do I fix the B3147 code?

Repairs may include replacing the faulty unlock switch, repairing or replacing damaged wiring, or clearing corrosion from connectors. In rare cases, the BCM may need reprogramming or replacement.

8. Can I clear the B3147 code without repairing the issue?

Clearing the code without addressing the underlying problem may result in the code returning shortly after.

9. How much does it cost to fix the B3147 code?

Repair costs vary depending on the issue but may range from $50 to $300 for parts and labor, depending on whether the problem is with the switch, wiring, or BCM.

10. Can the B3147 code affect other systems in the vehicle?

While the code itself is specific to the door unlock circuit, it could indicate broader electrical issues that might eventually affect other systems if left unresolved.