P1155 SUBARU Possible Causes
- Faulty O2 sensor HO2S21
- O2 sensor HO2S21 wiring harness open or shorted
- Poor electrical connection in O2 sensor HO2S21 circuit
How to Fix P1155 SUBARU Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1155 SUBARU Meaning
HO2S21 Circuit High Range/Performance is the generic description for Subaru code P1155, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about Subaru OBDII code P1155.