Code B1230 appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
B1230
NiskiMalfunction of the Sunlight Sensor Circuit or CD Player Activation Signal. Manufacturer-specific code, most often indicates a short circuit in the automatic climate control sunlight sensor circuit (or a CD player ON signal fault in GM/Chevrolet vehicles).
OBD-II (EN): Solar Sensor Circuit or CD Player Turn On Signal Fault
Code B1230 is a body circuit fault – most often related to a short circuit in the automatic climate control sunlight sensor circuit or (in GM vehicles) a CD player signal fault. Symptoms may include incorrect climate control or audio system operation. Detailed electrical diagnosis is recommended, as the cause may lie in the sensor itself, the wiring harness, or the control module.
Symptoms
Incorrect automatic climate control operation (lack of temperature regulation based on sunlight); possible incorrect cabin temperature readings; in GM/Chevrolet vehicles – lack of CD player activation signal, possible sound loss or audio system disruption; fault indicator light illuminated or code stored in the control module.
Possible causes
• Short or open circuit in the sunlight sensor circuit (damaged sensor or wiring harness) • Damaged sunlight intensity sensor (usually mounted on the dashboard near the windshield) • Corrosion or loose electrical connector at the sensor or climate control module • Damaged climate control module (HVAC control module) • In GM/Chevrolet vehicles: fault in the CD player ON signal wiring harness or damaged audio module/head unit
Affected systems
Automatyczna klimatyzacja (HVAC)Czujnik nasłonecznieniaSystem audio / odtwarzacz CD (GM/Chevrolet)Moduł sterowania nadwoziem (BCM)Instalacja elektryczna kabiny
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code B1230 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.