Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
B0155
ŚredniRefrigerant Pressure Sensor Circuit – problem in the air conditioning system.
Code B0155 indicates a fault in the refrigerant pressure sensor circuit in the air conditioning system. This may mean the air conditioning is not working efficiently or at all. The cause could be a faulty sensor or low refrigerant level – professional diagnostics are recommended.
Symptoms
The Check Engine light (or air conditioning system warning light) comes on. The air conditioning works poorly, does not cool, or only turns on sporadically. A message about low refrigerant pressure may be displayed.
Possible causes
- Faulty refrigerant pressure sensor - Broken or shorted wires in the sensor circuit - Poor sensor connection/plug - Low refrigerant level or no refrigerant - Malfunction of the air conditioning control module (rare)
Affected systems
Does code B0155 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.