Odometer circuit memory fault
What it means
B0550. Odometer circuit memory fault. The body control module cannot store or display the odometer reading and the body warning light comes on.. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.
Findings, check these first
- Body control module needs reprogramming
- Faulty body control module
- Body control module harness open or shorted
- Poor electrical connection at the body control module
Standard procedure
- Confirm the code with a scan tool
- Inspect the body control module connector for damage
- Check the body control module power and ground circuits
- Reprogram the body control module and clear the code
- Replace the body control module only after circuit tests and programming fail
Look up another code
Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.
Sources and review
Review: checked against the recorded source material.
- B0550 CHEVROLET Code: Meaning, Causes, and Symptoms | OBD2 Codes - OBD2 Codes
live reference page (obd2-codes.co)
Supports: CHEVROLET and GM-family meaning and likely causes for B0550
Fetched directly. B0550 reads "Odometer Circuit General Memory Malfunction".
- Code B0550 meaning and causes | OBDII.pro
live reference page (obdii.pro)
Supports: independent corroboration of the GM meaning
Fetched directly. obdii.pro is a separate publisher and gives the GM meaning as: Season odometer circuit malfunction More details about the error B0550 and possible reasons for its occurrence.
Last updated 2026-10-02.
Report a correction for B0550. Include your vehicle, the issue and a source if you have one.