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

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Cost of diagnosing the P2195 code

P2195 is a diagnostic trouble code (DTC) for "O2 Sensor Signal Stuck Lean Bank 1 Sensor 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

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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.

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Angelo

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Angelo
10 years of experience
Lexus RX350 - Check Engine Light is on - Nashville, Tennessee
Angelo was great!! Communicated with me really well and often, and made sure I fully understood the problem and how he fixed it. Highly recommend!!

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Casey
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Ford Fusion - Check Engine Light is on - Katy, Texas
Casey was super great, he spent a good amount of time doing a thorough investigation to make sure he diagnosed the issue with my car correctly and gave me sound advice. He also spent time explaining to me what the problem was which was much appreciated.

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Matthew
33 years of experience
Ford Expedition - Check Engine Light is on - Hampton, Virginia
As always, he's never late, very professional, has never went pass the estimated time, goes above and beyond and he breaks it down and explains everything so that you know exactly what he did and what needs to be done. Always satisfied with his work.


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