P05E2
A/C Refrigerant Pressure Sensor B Circuit Intermittent or Erratic
The high-side refrigerant pressure sensor B reports intermittent or erratic signal - typically a connector or harness fault on the sensor that lives close to the compressor.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Intermittent contact at connectorCommon
- Connector with intermittent contact under vibrationLess likely
- Harness routed against vibrating componentLess likely
Parts involved
- AC Pressure Sensor B
- AC Pressure Wiring B
P05E2 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.