What does B0332 mean on a Chevy?

B0332. Vent control switch circuit is open. The HVAC module cannot read the vent selection and the body warning light comes on. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0332 on a Chevy?

Worn or sticking vent position switch in the HVAC control head Open in the vent switch signal circuit to the HVAC module Corroded or loose HVAC control head connector Failed HVAC control head Chafed vent switch harness behind the control head

How do I fix B0332 on a Chevy?

Confirm the code with a scan tool Inspect and reseat the HVAC control head connector Test the vent switch and its signal circuit for an open Repair damaged wiring before replacing any parts Replace the HVAC control head only after circuit tests pass, then clear the code and retest

Code

B0332

Vent control switch 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

B0332. Vent control switch circuit is open. The HVAC module cannot read the vent selection 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

Worn or sticking vent position switch in the HVAC control head
Open in the vent switch signal circuit to the HVAC module
Corroded or loose HVAC control head connector
Failed HVAC control head
Chafed vent switch harness behind the control head

Standard procedure

Confirm the code with a scan tool
Inspect and reseat the HVAC control head connector
Test the vent switch and its signal circuit for an open
Repair damaged wiring before replacing any parts
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 B0332 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0332
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0332 CHEVROLET Ambient Air Temperature Sensor Short To Ground | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: Chevrolet meaning and possible causes for B0332
Fetched directly. Model and year fitment remain curator claims.
B0332 CHEVROLET Ambient Air Temperature Sensor Short To Ground | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Chevrolet meaning and causes for B0332
Same Chevrolet text as the engine-codes page (both sites share one publisher).

Review note: obdii.pro GM names the climate control vent switch circuit; the archived Chevrolet page names the ambient air temperature sensor 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 B0332. Include your vehicle, the issue and a source if you have one.