What does B0163 mean on a Chevy?

B0163. Passenger compartment temperature sensor 1 circuit malfunction. The HVAC module loses its cabin reading and sets a body warning light. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0163 on a Chevy?

Failed passenger compartment temperature sensor 1 with an out of range element Open or short in the passenger compartment temperature sensor 1 signal circuit Corroded or loose passenger compartment temperature sensor 1 connector Passenger compartment temperature sensor 1 blocked by debris or a clogged aspirator Faulty input inside the HVAC control module

How do I fix B0163 on a Chevy?

Confirm the code with a scan tool and compare the passenger compartment temperature sensor 1 reading to cabin temperature Inspect and reseat the passenger compartment temperature sensor 1 connector Check the aspirator for a clog and clear anything blocking the sensor Test the passenger compartment temperature sensor 1 and its signal circuit against the service chart Replace the passenger compartment temperature sensor 1 only if its reading does not match cabin temperature, then clear the code and retest

Code

B0163

Passenger compartment temperature sensor 1 circuit malfunction

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

B0163. Passenger compartment temperature sensor 1 circuit malfunction. The HVAC module loses its cabin reading 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

Failed passenger compartment temperature sensor 1 with an out of range element
Open or short in the passenger compartment temperature sensor 1 signal circuit
Corroded or loose passenger compartment temperature sensor 1 connector
Passenger compartment temperature sensor 1 blocked by debris or a clogged aspirator
Faulty input inside the HVAC control module

Standard procedure

Confirm the code with a scan tool and compare the passenger compartment temperature sensor 1 reading to cabin temperature
Inspect and reseat the passenger compartment temperature sensor 1 connector
Check the aspirator for a clog and clear anything blocking the sensor
Test the passenger compartment temperature sensor 1 and its signal circuit against the service chart
Replace the passenger compartment temperature sensor 1 only if its reading does not match cabin temperature, 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 B0163 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0163
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0163 CHEVROLET Passenger Compartment Temperature Sensor 1 Circuit | 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.
B0163 CHEVROLET Passenger Compartment Temperature Sensor 1 Circuit | 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.

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