OBD-II Fault Code

B2443: Powertrain Performance Mode Switch Circuit failure

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2443.

System family

Body

Generic/SAE

Repair category

Electrical circuit / sensor

Use this category to narrow your checks before replacing parts.

Severity

Medium

Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.

What B2443 usually means

Powertrain Performance Mode Switch Circuit failure.

Common symptoms

Body/accessory warning lamp or feature not working

Likely causes

Signal out of expected range; Mechanical issue affecting sensor reading; Slow/sticking actuator

Diagnostic checks

Check related fuses, connectors, grounds and switch/module power supply; Compare live data to expected value and inspect mechanical operation

Repair guidance

Repair mechanical cause, clean/replace sticking actuator, or replace sensor after confirmation

Verification after repair

Operate the affected body/accessory system and rescan

Note: Confirm vehicle make/model/year because manufacturer-specific codes can vary. A DTC identifies a circuit or system condition, not always the failed part.