P2195 — O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P2195 means: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include failed O2 or wideband air/fuel sensor, vacuum leak and exhaust leak before the sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed O2 or wideband air/fuel sensor
- Vacuum leak
- Exhaust leak before the sensor
- Low fuel pressure
Symptoms
- Check engine light
- Hesitation
- Higher fuel consumption
How to diagnose it step by step
- Read fuel trims.
- Look for vacuum and exhaust leaks.
- Check sensor response.
- Replace the sensor if needed.
How to fix it
Check whether the mixture is really lean (very positive fuel trims). If it is, look for leaks; if not, replace the sensor.
Estimated repair cost
Sensor: $100–400.
Frequently asked questions
What does DTC code P2195 mean?
O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1).
Is code P2195 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P2195?
Yes, carefully.
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