Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B1656: EEPROM Write Error: Description
Driver Door Module (DDM), Instrument Panel Cluster (IPC) module, Memory Seat Module (MSM) and Standard Body Module (SBM) calibrations are stored internally in Electronically Erasable Programmable Read Only Memory (EEPROM). When ignition switch is first turned to RUN position, each module performs internal tests on EEPROM and can determine integrity of its non-volatile memory. Each module also attempts to write to its own non-volatile memory.
DTC B1656 will set when ignition switch is first turned to RUN position and affected module detects an internal memory malfunction (write error). No driver warning message will be displayed. DTC B1656 can be cleared using scan tool or on-board diagnostics, or history DTC will disappear after 50 consecutive ignition cycles if fault conditions do not reoccur.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.