Front blower motor power circuit malfunction
What it means
B0198. Front blower motor power circuit malfunction. The HVAC module cannot power the blower and 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 or short in the front blower motor power circuit
- Blown or corroded front blower motor fuse
- Failed front blower motor with high current draw
- Corroded or loose front blower power connector
- Faulty output inside the HVAC control module
Standard procedure
- Confirm the code with a scan tool
- Check the front blower fuse and test for voltage at the blower connector
- Inspect the front blower power connector for corrosion and pin damage
- Test the front blower power circuit for opens, shorts and voltage drop
- Replace the front blower motor 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 B0198 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0198
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
- B0198 CHEVROLET Front Blower Motor Power Circuit Malfunction | 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.
- B0198 CHEVROLET Front Blower Motor Power Circuit Malfunction | 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 B0198. Include your vehicle, the issue and a source if you have one.