AutoCodes – Generic – P2195

P2195 Code - Oxygen Sensor Signal Biased/Stuck Lean - Bank 1 Sensor 1

Quick Answer

The Engine Control Module (ECM) uses the heated oxygen sensor information to regulate the air-fuel ratio close to a stoichiometric ratio. Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2195 indicates Oxygen Sensor Signal Biased/Stuck Lean - Bank 1 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 52,982

How popular is this code, among other codes? Medium

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2195 Description

The Engine Control Module (ECM) uses the heated oxygen sensor information to regulate the air-fuel ratio close to a stoichiometric ratio. This maximizes the catalytic converter’s ability to purify the exhaust gas. The sensor detects oxygen levels in the exhaust gas and sends this signal to the ECM. The inner surface of the sensor element is exposed to outside air. The outer surface of the sensor element is exposed to exhaust gas. The sensor element is made of platinum coated zirconia and includes an inte- grated heating element. The heated oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity of the stoichiometric air-fuel ratio. The heated oxygen sensor generates output voltage between 0 V and 1.0 V in response to the oxygen concentration in exhaust gas. When the output voltage of the heated oxygen sensor is 0.55 V or more, the ECM judges that the air-fuel ratio is RICH. When it is 0.4 V or less, the ECM judges that the air-fuel ratio is LEAN. Under normal condition, the output voltage from the heated oxygen sensor alternates RICH and LEAN sides periodically. If the heated oxygen sensor outputs RICH signal (or LEAN signal) constantly, or if the heated oxygen sensor cannot output enough voltage to reach the minimum specification, the ECM interprets this as a malfunction in the heated oxygen sensor and sets a DTC.

OBDII Code P2195 - Oxygen Sensor Signal Biased/Stuck Lean - Bank 1 Sensor 1 - AutoCodes.com — P2195 Code - Oxygen Sensor Signal Biased/Stuck Lean - Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2195?

Faulty Front Heated Oxygen Sensor Bank 1
Front Heated Oxygen Sensor Bank 1 harness is open or shorted
Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Vacuums leaks

How to Fix the DTC P2195?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2195 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2195 code?

Need more information on how to fix the P2195 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2195 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2195 Acura — Rear A/F Sensor Sensor 1 Bank 1 Signal Stuck Lean
P2195 BMW — O2 Sensor Signal Stuck Lean Bank 1 Sensor 1
P2195 Chrysler — O2 Sensor Heater Circuit Fault
P2195 Dodge — O2 Sensor Heater Circuit Fault
P2195 Ford — Oxygen Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2195 Honda — Rear A/F Sensor Sensor 1 Bank 1 Signal Stuck Lean
P2195 Hyundai — HO2S Signal Stuck Lean Bank 1 Sensor 1
P2195 Jeep — O2 Sensor Heater Circuit Fault
P2195 KIA — O2 Sensor Signal Stuck Lean Bank 1 Sensor 1
P2195 Lexus — Oxygen Air/Fuel Sensor Signal Stuck Lean Bank 1 Sensor 1
P2195 Lincoln — Oxygen Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2195 Mazda — Upstream O2 Not Switching RF Stuck Lean
P2195 Mercedes-Benz — O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2195 Mercury — Oxygen Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2195 Mitsubishi — O2 Sensor Signal Stuck Lean Bank 1 Sensor 1
P2195 RAM — O2 Sensor Heater Circuit Fault
P2195 Scion — Oxygen Air/Fuel Sensor Signal Stuck Lean Bank 1 Sensor 1
P2195 Suzuki — O2 Sensor Signal Stuck Lean- Sensor 1 Bank 1
P2195 Toyota — Oxygen Air/Fuel Sensor Signal Stuck Lean Bank 1 Sensor 1
P2195 Volkswagen — HO2S11 Sensor Signal Stuck Lean

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.