Rear blower motor speed circuit is open
What it means
B0212. Rear blower motor speed circuit is open. The auxiliary blower gets no speed command 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
- Open in the rear blower speed circuit
- Unseated or corroded rear blower motor connector
- Blown or corroded rear blower fuse
- Seized rear auxiliary blower motor drawing no speed signal
- Faulty output inside the rear blower control module
Standard procedure
- Confirm the code with a scan tool and command each rear auxiliary blower speed
- Wiggle-test the rear blower harness while watching the commanded speed
- Inspect and reseat the rear blower motor connector
- Test the rear blower speed circuit for an open
- Replace the rear blower or control module only after the circuit tests pass, then clear the code and retest
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.
- Code B0212 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0212
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
- B0212 CHEVROLET Rear Blower Motor Speed Open | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: Chevrolet meaning and possible causes for B0212
Fetched directly. Model and year fitment remain curator claims.
- B0212 CHEVROLET Rear Blower Motor Speed Open | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Chevrolet meaning and causes for B0212
Same Chevrolet text as the engine-codes page (both sites share one publisher).
Last updated 2026-10-10.
Report a correction for B0212. Include your vehicle, the issue and a source if you have one.