AutoCodes – Chevrolet – B3157 Chevrolet

B3157 Chevrolet Code - Right Front Lock 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: B3157 Chevrolet indicates Right Front Lock 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 520

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 B3157 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 B3157 Chevrolet - Right Front Lock Switch Circuit Low - AutoCodes.com — B3157 Chevrolet Code - Right Front Lock Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3157 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 B3157 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 B3157 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 B3157 Chevrolet Code

1. What does the OBDII code B3157 mean on a Chevrolet?

B3157 indicates a problem with the right front door lock switch circuit, specifically that the circuit voltage is lower than expected.

2. What are the common symptoms of code B3157 in a Chevrolet?

Symptoms may include the right front door lock not responding to commands, intermittent locking/unlocking, or the door lock switch not functioning properly.

3. What causes the B3157 code to appear on a Chevrolet?

Possible causes include a faulty door lock switch, damaged wiring or connectors in the circuit, a short to ground, or a malfunctioning body control module (BCM).

4. Can I still drive my Chevrolet with the B3157 code active?

Yes, you can usually drive the vehicle, but the right front door lock may not function correctly, which could be inconvenient or create a security concern.

5. How can I diagnose the B3157 code on a Chevrolet?

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

6. How do I fix the B3157 code on my Chevrolet?

Repairs may include replacing the right front door lock switch, repairing damaged wiring, securing loose connections, or reprogramming/replacing the body control module if necessary.

7. Is the B3157 code covered under warranty for my Chevrolet?

This depends on your vehicleâ€™s warranty terms and coverage. Consult your Chevrolet dealer or warranty documentation for details.

8. How much does it cost to repair the B3157 code on a Chevrolet?

Repair costs vary but may range from $50 to $300, depending on whether the issue involves replacing the switch, repairing wiring, or addressing a BCM issue.

9. Can a dead battery cause the B3157 code on a Chevrolet?

While a dead battery itself is unlikely to directly cause the code, power interruptions or voltage drops could potentially contribute to circuit issues.

10. Do I need a professional mechanic to fix the B3157 code on my Chevrolet?

If youâ€™re comfortable with electrical diagnostics and repairs, you may be able to fix it yourself. Otherwise, consult a professional mechanic for accurate diagnosis and repair.