What does B0361 mean on a Chevy?

B0361. Auto control switch circuit high. The HVAC module sees an implausible switch signal and the body warning light comes on. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0361 on a Chevy?

Auto switch stuck closed in the HVAC control head Auto switch signal wire shorted to voltage Corroded control head connector bridging terminals Failed HVAC control head Water intrusion at the control head connector

How do I fix B0361 on a Chevy?

Confirm the code with a scan tool Inspect the control head connector for corrosion and bridged terminals Test the auto switch signal circuit for a short to voltage Cycle the auto switch and watch its status on the scan tool Replace the HVAC control head only after circuit tests pass, then clear the code and retest

Code

B0361

Auto control switch circuit high

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

B0361. Auto control switch circuit high. The HVAC module sees an implausible switch signal 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

Auto switch stuck closed in the HVAC control head
Auto switch signal wire shorted to voltage
Corroded control head connector bridging terminals
Failed HVAC control head
Water intrusion at the control head connector

Standard procedure

Confirm the code with a scan tool
Inspect the control head connector for corrosion and bridged terminals
Test the auto switch signal circuit for a short to voltage
Cycle the auto switch and watch its status on the scan tool
Replace the HVAC control head only after 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: qualified. Read the source limits below.

Code B0361 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0361
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0361 CHEVROLET Left Actuator Feedback Short To Ground | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: Chevrolet meaning and possible causes for B0361
Fetched directly. Model and year fitment remain curator claims.
B0361 CHEVROLET Left Actuator Feedback Short To Ground | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Chevrolet meaning and causes for B0361
Same Chevrolet text as the engine-codes page (both sites share one publisher).

Review note: obdii.pro GM names the auto control switch circuit high; the archived Chevrolet page names the left actuator feedback short to ground. The circuits differ, so the record uses the GM wording and flags the conflict

Last updated 2026-10-10.

Report a correction for B0361. Include your vehicle, the issue and a source if you have one.