P2195Fuel & Air Metering

O2 Sensor Signal Stuck Lean - Bank 1 Sensor 1

P2195 means the upstream oxygen sensor on bank 1 stayed stuck reporting a lean condition when the ECM expected it to switch, so it cannot use that sensor for fuel control.

🚗 Yes, usually, but fuel trims may be off. Diagnose soon.
MEDIUM
severity
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🎯 Top Causes, Ranked by Likelihood

#1Failed upstream oxygen sensor$100-$350
40%
A slow or dead O2 sensor sticks at a lean reading.
#2Actual lean condition or vacuum leak$50-$400
25%
A real lean mixture keeps the sensor reading lean.
#3Exhaust leak near the sensor$50-$400
20%
Leaked air upstream makes the sensor read lean.
#4Wiring or connector fault$50-$300
15%
A damaged sensor circuit skews the signal.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$30-$350
Shop Cost
$150-$500

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2195

1Read O2 sensor live data for switching activity
2Check fuel trims for a true lean condition
3Inspect for exhaust and vacuum leaks
4Replace the upstream oxygen sensor if it is not switching

❓ Frequently Asked Questions

Can I drive with a P2195 code?
Usually yes, but fuel control is degraded and emissions may suffer. Diagnose soon.
How much does it cost to fix P2195?
An oxygen sensor replacement typically runs $150-$500 at a shop.
What causes P2195?
Usually a failed upstream O2 sensor, a real lean condition, or an exhaust leak on bank 1.

🔗 Related Codes

P2196P2197P2198P0171P0131
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