What does B0209 mean on a Chevy?

B0209. Rear blower motor speed circuit range fault. The auxiliary blower runs outside its expected range and the body warning light comes on. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0209 on a Chevy?

Rear auxiliary blower motor drawing current outside its expected range Rear blower control module unable to hold the commanded speed Seized or dragging rear auxiliary blower motor Corroded rear blower connector or ground Faulty output inside the rear blower control module

How do I fix B0209 on a Chevy?

Confirm the code with a scan tool and command each rear auxiliary blower speed Watch commanded versus actual rear blower speed on the scan tool Inspect and reseat the rear blower motor connector Check the rear blower motor for binding and measure its current draw Replace the rear blower or control module only after the circuit tests pass, then clear the code and retest

Code

B0209

Rear blower motor speed circuit range fault

Category: Body
Severity: Body Warning Light
Applies to: Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code
Related: No single generic twin. See OBD Codes List

What it means

B0209. Rear blower motor speed circuit range fault. The auxiliary blower runs outside its expected range 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

Rear auxiliary blower motor drawing current outside its expected range
Rear blower control module unable to hold the commanded speed
Seized or dragging rear auxiliary blower motor
Corroded rear blower connector or ground
Faulty output inside the rear blower control module

Standard procedure

Confirm the code with a scan tool and command each rear auxiliary blower speed
Watch commanded versus actual rear blower speed on the scan tool
Inspect and reseat the rear blower motor connector
Check the rear blower motor for binding and measure its current draw
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 B0209 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0209
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0209 CHEVROLET Rear Blower Motor Speed Range/Performance | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: Chevrolet meaning and possible causes for B0209
Fetched directly. Model and year fitment remain curator claims.
B0209 CHEVROLET Rear Blower Motor Speed Range/Performance | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Chevrolet meaning and causes for B0209
Same Chevrolet text as the engine-codes page (both sites share one publisher).

Last updated 2026-10-10.

Report a correction for B0209. Include your vehicle, the issue and a source if you have one.