Code Definition

B1004 — Keep alive memory KAM error

System: Body  |  Type: Manufacturer-Specific  |  Make: Holden

About B1004

B1004 is a manufacturer-specific body diagnostic trouble code recorded for Holden vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1004 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This Holden-specific body code is set when a control module — typically the Body Control Module (BCM) — detects an error in its Keep Alive Memory (KAM). KAM is a section of non-volatile memory within the module that retains learned adaptive values, configuration data, and operating parameters when the ignition is switched off, such as idle speed trim, security codes, and personalised vehicle settings. The code is triggered when the module performs a memory integrity check at power-up and finds that the stored data is corrupt, missing, or cannot be read reliably — commonly caused by a bat...

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