B0288
HVAC A/C Pressure Sensor Circuit
A fault has been detected in the A/C refrigerant pressure sensor circuit. The compressor may be disabled to protect the system.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: easy
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
Ordered by how often each turns out to be the cause.
- Pressure sensor failureCommon
- Low refrigerant chargePossible
- Faulty sensor connectorPossible
Parts involved
- AC Pressure Sensor
- AC Compressor Relay
- Hvac Control Module
B0288 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.