What Does B2142 Mean?
B2142 indicates a Non-Volatile Memory (NVM) failure in the Body Control Module (BCM) or related control module, specifically affecting the TIC (Test Interface Controller or similar interface component). The control module has detected that it cannot properly read from, write to, or verify data stored in its permanent memory storage. This prevents the module from retaining critical configuration data, calibrations, and learned parameters between ignition cycles.
Common Causes
45%
Failed or corrupted Body Control Module with internal NVM chip failure
25%
Corrupted module software or incomplete flash programming requiring reprogramming
20%
Low or unstable voltage supply to BCM causing memory write/read errors
10%
Electromagnetic interference or voltage spike damage to memory circuits
Diagnostic Steps
1
Step 1: Perform battery and charging system test with multimeter - verify battery voltage is 12.4-12.6V key-off and 13.8-14.5V at idle. Check for voltage drops or fluctuations that could corrupt memory operations.
2
Step 2: Inspect BCM power and ground circuits with multimeter - verify clean 12V supply at BCM connector and less than 0.1V resistance on ground circuits. Check for corrosion, loose pins, or damaged connectors.
3
Step 3: Attempt to clear the code and perform BCM reset procedure per manufacturer specifications. Monitor freeze frame data to determine if fault returns immediately or after specific conditions.
4
Step 4: Using manufacturer diagnostic software, attempt module reprogramming or software update to rule out corrupted firmware. Verify module can accept and retain new programming.
5
Step 5: If reprogramming fails or code returns immediately, perform module communication test to verify data bus integrity (CAN/LIN). Check for other network-related codes that might indicate communication issues.
6
Step 6: If all previous steps pass but code persists, replace Body Control Module and perform complete module initialization and programming with all vehicle option configurations.
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
B2142 indicates a Non-Volatile Memory (NVM) failure in the Body Control Module (BCM) or related control module, specifically affecting the TIC (Test Interface Controller or similar interface component). The control module has detected that it cannot properly read from, write to, or verify data store...
The most common cause of B2142 (NVM TIC Failure) is: Failed or corrupted Body Control Module with internal NVM chip failure
Typical repair costs for B2142 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive short distances, but the vehicle may lose critical settings, fail to start intermittently, or experience erratic body system behavior (windows, locks, lights). Repair should be completed soon as progressive memory failure can leave the vehicle inoperable and may lose security/immobilizer data.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2142 to identify the root cause.
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Quick Info
Category
Body
System
Body Control Module / Memory Management System
Difficulty
Type
Generic (SAE)
Recommended Tools
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