What does B0164 mean on a Chevy?

B0164. Passenger compartment temperature sensor 1 reads out of range. The HVAC module ignores the cabin reading and sets a body warning. Applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

What causes B0164 on a Chevy?

Passenger compartment temperature sensor 1 element drifted out of range Open in the passenger compartment temperature sensor 1 signal circuit Corroded or loose passenger compartment temperature sensor 1 connector Clogged aspirator starving the passenger compartment temperature sensor 1 Faulty input inside the HVAC control module

How do I fix B0164 on a Chevy?

Confirm the code with a scan tool and watch the passenger compartment temperature sensor 1 reading Inspect and reseat the passenger compartment temperature sensor 1 connector Clear the aspirator and check that air moves across the sensor Test the passenger compartment temperature sensor 1 resistance against the service chart Replace the passenger compartment temperature sensor 1 only if it reads out of range at a known cabin temperature, then clear the code and retest

Code

B0164

Passenger compartment temperature sensor 1 reads out of range

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

B0164. Passenger compartment temperature sensor 1 reads out of range. The HVAC module ignores the cabin reading and sets a body warning. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.

Findings, check these first

Passenger compartment temperature sensor 1 element drifted out of range
Open in the passenger compartment temperature sensor 1 signal circuit
Corroded or loose passenger compartment temperature sensor 1 connector
Clogged aspirator starving the passenger compartment temperature sensor 1
Faulty input inside the HVAC control module

Standard procedure

Confirm the code with a scan tool and watch the passenger compartment temperature sensor 1 reading
Inspect and reseat the passenger compartment temperature sensor 1 connector
Clear the aspirator and check that air moves across the sensor
Test the passenger compartment temperature sensor 1 resistance against the service chart
Replace the passenger compartment temperature sensor 1 only if it reads out of range at a known 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: qualified. Read the source limits below.

Code B0164 definition | OBDII.pro
live manufacturer definition (obdii.pro)
Supports: GM manufacturer meaning for B0164
Fetched directly. The GM entry is the brand-family meaning used here. This site is independent of engine-codes and autocodes.
B0164 CHEVROLET Inside Air Temperature Sensor Circuit Range/Performance | 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.
B0164 CHEVROLET Inside Air Temperature Sensor Circuit Range/Performance | 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).

Review note: obdii.pro GM names passenger compartment temperature sensor 1 range and performance; the archive names the inside air temperature sensor circuit. Same location, different naming

Last updated 2026-10-10.

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