P1140 SUBARU Possible Causes
- Faulty left front oxygen sensor
- Left front oxygen sensor harness is open or shorted
- Poor electrical connection in left front oxygen sensor circuit
How to Fix P1140 SUBARU Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable 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)
P1140 SUBARU Meaning
The left front oxygen sensor heater circuit range is the generic description for Subaru code P1140, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have more information about the OBDII P1140 Subaru code.