What does B0197 mean on a Chevy?

B0197. Front blower motor speed circuit is open. The blower gets no speed command and the module sets a body warning light. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0197 on a Chevy?

Open in the front blower speed signal circuit Unseated or corroded front blower motor connector Failed front blower motor control module with an open output Front blower speed harness broken between the control head and the module Faulty output inside the HVAC control head

How do I fix B0197 on a Chevy?

Confirm the code with a scan tool and command each front blower speed Wiggle-test the front blower speed harness while watching commanded speed Inspect and reseat the front blower motor and control module connectors Test the front blower speed signal circuit for an open Replace the front blower motor control module only after the circuit tests pass, then clear the code and retest

Code

B0197

Front blower motor speed circuit is open

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

B0197. Front blower motor speed circuit is open. The blower gets no speed command and the module sets a body warning light. 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 front blower speed signal circuit
Unseated or corroded front blower motor connector
Failed front blower motor control module with an open output
Front blower speed harness broken between the control head and the module
Faulty output inside the HVAC control head

Standard procedure

Confirm the code with a scan tool and command each front blower speed
Wiggle-test the front blower speed harness while watching commanded speed
Inspect and reseat the front blower motor and control module connectors
Test the front blower speed signal circuit for an open
Replace the front blower motor 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 B0197 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0197
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0197 CHEVROLET Front Blower Motor Speed Circuit Open | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: Chevrolet meaning and possible causes
Fetched directly. Model and year fitment remain curator claims.
B0197 CHEVROLET Front Blower Motor Speed Circuit Open | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Chevrolet meaning and causes
Same Chevrolet text as the engine-codes page (both sites share one publisher).

Last updated 2026-10-10.

Report a correction for B0197. Include your vehicle, the issue and a source if you have one.