B3057 low

Manufacturer-specific (GM: No Security Code Programmed / theft-deterrent; some makes: A/C pressure sensor)

The B3057 code means the vehicle's onboard diagnostic system has detected: Manufacturer-specific (GM: No Security Code Programmed / theft-deterrent; some makes: A/C pressure sensor). This is a low severity code.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
easy
Estimated cost
Varies — depends on the specific component this manufacturer-specific code points to on your vehicle. Diagnose before buying parts.

Manufacturer-specific code. B3057 is a manufacturer-specific DTC, so its exact definition can differ by make, model, and year. Use the meaning above as a general guide, and always confirm it against your vehicle manufacturer's official service information (or a make-specific scan tool) before diagnosing or replacing parts.

What Are the Symptoms of B3057?

  • Check Engine or a related warning light on
  • Exact symptoms depend on the specific system this code covers for your make
  • A make-specific scan reveals which subsystem and circuit is involved

What Causes B3057? (Most Likely First)

  • A fault in the specific component or circuit this code monitors (the exact part varies by manufacturer) High
  • Damaged wiring, a corroded connector, or a poor ground in that circuit Moderate
  • A related sensor or control module reporting or causing the fault Moderate

Can I Still Drive with B3057?

Yes, but fix soon. B3057 is rated low severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.

Frequently Asked Questions

Does B3057 mean the same thing on every vehicle?

No. B3057 is a manufacturer-specific diagnostic trouble code, so its exact meaning varies by make, model, and year. Always confirm it against your vehicle manufacturer's service information before diagnosing or replacing parts.

What does B3057 most likely indicate?

Manufacturer-specific (GM: No Security Code Programmed / theft-deterrent; some makes: A/C pressure sensor). Treat this as a general guide and verify the specifics for your vehicle.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose B3057?

  1. Confirm your exact make, model, and year first — B3057 is manufacturer-specific and can mean different things across brands.

  2. Read B3057 with an enhanced/make-specific scan tool and check your manufacturer's official service information for the precise definition and procedure.

  3. Inspect the wiring, connectors, and grounds for the indicated circuit before replacing any part.

Which Vehicles Commonly Get B3057?

  • 2010-2020 Chevrolet Traverse
  • 2011-2021 Chevrolet Tahoe
  • 2010-2020 Chevrolet Malibu
  • 2009-2019 Buick LaCrosse

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