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

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...
P0684 OBD-II Trouble Code: Glow Plug Control Module to PCM Communication Circuit Range/Performance
P0684 code means there is a failing connection within the Glow Plug Control Module often due too corroded wires and solenoid failures.


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: How long and what is the process to replace a fuel pressure sensor?

A professional mechanic would require roughly 5 hours. (If just the regulator is replaced that takes about 1 hour). Some parts, as noted below, cannot be re-used, you need a precision inch pound torque wrench, FSM instructions (and TSB updates...

Q: Can't pass smog check due to Check Engine light

The Check Engine light requires a special scan tool to determine the issue. Additional diagnostics may be required. An intake leak is common on this engine and may cause leaks, low fluids, and many other issues. With the vehicle sitting...