B1001 medium Severity

B1001: Manufacturer-specific body code. Common interpretations include: Chevrolet/GM Option Configuration Error; other OEMs may assign different meanings (e.g., head‑lamp leveling relay or airbag system faults).

May not directly affect vehicle motion but can disable optional electrical systems or safety systems depending on OEM.

Overview

B1001 is a manufacturer‑specific Body DTC with meanings that vary by OEM. On Chevrolet/GM vehicles it commonly indicates an Option Configuration Error. Other sources list B1001 for airbag or headlamp leveling issues depending on make and model.

Common Symptoms

  • Depending on OEM: body electrical warning lights, failed option configuration, or system disablement

Most Common Causes

Control module not configured or misconfigured (Chevrolet/GM) medium

Reported by professional diagnostic references for GM vehicles as an option configuration error in body control modules.

Short to battery or wiring fault (generic body electrical interpretation) low

Some code tables list B1001 as headlamp leveling relay coil short to battery; this is not confirmed OEM for specific models.

Airbag system sensor or module fault (per some aftermarket references) low

Certain online references describe B1001 in the context of airbag/airbag control unit faults on specific Japanese vehicles, but this is not OEM documented.

Diagnostic Steps

  1. Determine vehicle make, model, year and retrieve OEM service documentation for B1001.
    Expected: OEM definition of B1001 for the specific vehicle.
    Interpretation: If OEM documentation defines B1001 meaning, subsequent steps target that system.
  2. Connect professional diagnostic scan tool and read all stored DTCs with freeze frame data.
    Expected: Verify B1001 and any related codes.
    Interpretation: Additional codes can help isolate system context (e.g., airbag, body module, lighting).
  3. Inspect relevant wiring and connectors for the system identified by OEM definition (e.g., body control module, headlamp leveling, airbag module).
    Expected: No shorts, opens, or corrosion.
    Interpretation: Electrical integrity issues can trigger B1001 in many body control systems.
  4. Verify module configuration/programming using OEM programming tool.
    Expected: Module config matches vehicle build and options.
    Interpretation: If misconfiguration detected, reprogramming may clear the code.

Repair Solutions

Reconfigure or reprogram the affected control module per OEM specification. medium
Estimated Cost: $150 - $500

Requires OEM diagnostic/programming tools.

Repair wiring harness or connector faults in the affected circuit. medium
Estimated Cost: $50 - $250

Depends on accessibility and extent of damage.

Replace faulty sensor or module if OEM documentation indicates specific component failure. hard
Estimated Cost: $200 - $1200

Costs vary widely by vehicle and component.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming B1001 universally means a specific subsystem (e.g., airbags) across all makes

Frequently Asked Questions

Technical definition of B1001 OBD-II Code

The B1001 code stands for Manufacturer-specific body code. Common interpretations include: Chevrolet/GM Option Configuration Error; other OEMs may assign different meanings (e.g., head‑lamp leveling relay or airbag system faults).. This generally indicates an issue with the Vehicle system.

Should I stop driving if I have B1001?

You should treat B1001 as a medium issue. May not directly affect vehicle motion but can disable optional electrical systems or safety systems depending on OEM.

What happens when the B1001 code is active?

Common symptoms include: Depending on OEM: body electrical warning lights, failed option configuration, or system disablement. You might also notice the Check Engine Light is on.

What causes the B1001 code?

It can be caused by several factors, most notably: Control module not configured or misconfigured (Chevrolet/GM), Short to battery or wiring fault (generic body electrical interpretation), Airbag system sensor or module fault (per some aftermarket references).

Repair cost breakdown for B1001

Expect to pay around $250 if the issue is a Repair wiring harness or connector faults in the affected circuit., but up to $1200 if the Replace faulty sensor or module if OEM documentation indicates specific component failure. needs replacement.

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