Skip the auto shop - Our mechanics make house calls

P2195 OBD-II Trouble Code: O2 Sensor Signal Stuck Lean Bank 1 Sensor 1

check engine light logo

P2195 trouble code definition

O2 Sensor Signal Stuck Lean Bank 1 Sensor 1

What the P2195 code means

P2195 is an OBD-II generic code for the engine control module (ECM) detecting the O2 sensor signal stuck lean for bank 1 sensor 1. The engine has tried to lean out a rich condition and failed.

What causes the P2195 code?

The engine control module is getting a signal from the bank 1 sensor 1 it is overly rich in that side of the engine and has tried to lean the mixture out to its limit causing the code to be set.

What are the symptoms of the P2195 code?

  • The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.

  • The engine may be running rough, rich, and misfiring.

How does a mechanic diagnose the P2195 code?

  • Scans and documents the code in the ECM to check the freeze frame data for failure

  • Checks for any intake vacuum leaks or intake hose leaks between the mass air sensor and the throttle body

  • Checks for excessive fuel pressure

  • Checks the codes to see if only one or both sides of the engine are running rich

  • Checks the fuel injectors to see if one is leaking or stuck open

Common mistakes when diagnosing the P2195 code

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired

  • Failing to clear the ECM codes after the codes are fixed

  • Failing to check the air filter for damage, allowing air to enter the intake unmetered by the mass air sensor

How serious is the P2195 code?

Code P2195 is an indication that the ECM is getting a signal to go lean from the O2 sensor and has tried to lean out the mixture to its limit and the system is still too rich.

What repairs can fix the P2195 code?

Additional comments for consideration regarding the P2195 code

Code P2195 is for only one of the O2 sensors and may be accompanied with other O2 sensor codes if the problem is causing the entire engine to run rich like excessive fuel pressure or mass air sensor or tube problems.

Need help with a P2195 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: OBD-II codes P2195 and P0171 appear

P2195 and P0171 occur when the engine is running too rich (too much fuel relative to air charge) and the engine feedback system is unable to compensate. The "how can you fix this" depends on which component(s) in the system...

Q: Obd codes 33,34, and 43 what does this mean? 1993 Chevrolet K1500

Hi - the diagnostic trouble codes you mention are: 33- Manifold Absolute Pressure circuit/sensor malfunction: wiring open circuit/shorted circuit to positive, hose blocked/leaking, MAP sensor, 34- manifold Absolute Pressure circuit/sensor malfunction: wiring shorted to ground, 42- ignition control module circuit...

Q: 04 maxima will not start, motor turns but does not start

Hi there. The VIAS (variable intake air system) is not likely to create a no start condition. Spraying starting fluid with no result leads me to believe there is no spark. Assuming the engine is properly turning over, diagnosis needs...