P2097 OBD-II Trouble Code: Post Catalyst Fuel Trim System Too Rich Bank 1

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2097 code

P2097 is a diagnostic trouble code (DTC) for "Post Catalyst Fuel Trim System Too Rich Bank 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 for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P2097 DIAGNOSTIC Get a fair and transparent estimate upfront

P2097 code definition

P2097 is a general OBD-II diagnostic trouble code that indicates a fault with the post catalyst fuel trim system being too rich in bank 1. This code may be seen with misfire, lean, or rich codes as well.

What the P2097 code means

The engine control module (ECM) uses the second oxygen sensors to measure the exhaust after it has passed the catalytic converter. If everything is working properly, the catalytic converter should burn off any excess emissions and the fuel trim should be within range. When the oxygen sensors after the catalytic converter relay to the ECM that the fuel trim is too rich, then the P2097 code is set. A Check Engine Light will accompany the P2097 code as well as a failsafe mode. The failsafe mode will remain until normal operation is found or the fault is resolved.

What causes the P2097 code?

Commonly these items are the cause of the P2097 code:

  • Exhaust leak near the downstream oxygen sensor
  • Catalytic converter failure
  • Faulty oxygen sensor
  • Oxygen sensor that is reading poorly

What are the symptoms of the P2097 code?

The symptoms can vary greatly due to the many different causes:

  • Check Engine Light visible on the dashboard
  • Lean condition
  • Rich condition
  • Engine misfires
  • Lack of power
  • No felt symptoms at all
  • Engine that stalls when started

How does a mechanic diagnose the P2097 code?

A mechanic will begin by hooking up a scan tool and checking for any codes stored in the ECM including history and pending codes. Note all codes found in addition to the freeze frame data. Then all codes will be cleared and a test drive performed.

Next, a visual inspection will be done to look for any obvious signs of damage or broken components. The scan tool will then be used to check the oxygen sensor readings and compare them between banks, then the long-term fuel trims will be observed while the throttle is operated. The vehicle will then be raised and inspected for exhaust leaks. Lastly, the catalytic converter will be tested.

Common mistakes when diagnosing the P2097 code

Common mistakes can be made when the catalytic converter is blamed but the fault actually lies with an oxygen sensor that is reading faulty. Step-by-step diagnosis is important to make accurate repairs. Steps should be followed in the proper order without skipping any.

How serious is the P2097 code?

The P2097 code can have no symptoms or may have an engine that will not run. If drivability concerns are present, the vehicle should not be driven until the vehicle is repaired.

What repairs can fix the P2097 code?

Simple repairs such as these can fix the P2097 code:

Additional comments for consideration regarding the P2097 code

Exhaust leaks are generally fairly simple to find. There are two simple tests for them. The first is to inspect the exhaust and look for any soot marks or places where the exhaust is very dark. These are easy to see and indicate an exhaust leak.

To find smaller leaks, the technician will run their hands near the exhaust while the vehicle is running to feel for the air leaking out. Caution should be taken when the last test is done as the exhaust can cause burns.

Need help with a P2097 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.

Check Engine Light
trouble codes
P2097

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2097 code.

SCHEDULE P2097 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0690 OBD-II Trouble Code: ECM/PCM Power Relay Sense Circuit High
P0690 means a high voltage problem with the power supply to the ECM/PCM which may cause Check Engine Light to come on or the vehicle will not start.
P0595 OBD-II Trouble Code: Cruise Control Servo Control Circuit Low
P0595 means an issue with the cruise control servo control circuit which causes the cruise control on the vehicle to work poorly or not at all.
P0539 OBD-II Trouble Code: A/C Evaporator Temperature Sensor Circuit Intermittent
P0539 means the A/C evaporator temperature sensor has a too high/low voltage signal, usually caused by a faulty evaporator temperature sensor.

Related questions

Car hard to start when warm
A Check Engine Light can be caused by many problems, and in fact, is probably related to your hard starting problem. I would recommend having the vehicle diagnosed by a professional technician, such as one from YourMechanic. They can scan...
Battery replaced, engine malfunction warning
Hello there. With any Check Engine Light, the first step is to have the code read to determine what system is involved with the fault. It is possible that this fault was caused by the vehicle losing power when the...
MAF sensor
jeff engstrom

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com