Skip the auto shop - Our mechanics make house calls

Q: P2097 trouble code - 2012 Chevrolet Captiva Sport

asked by on

HOW TO REPAIR POST CATALYST FUEL TRIM SYSTEM HIGH LIMIT CODE P2097

My car has 83830 miles.
My car has an automatic transmission.

Hi there. For your vehicle’s P2097 (post catalyst fuel trim system too rich bank 1) code, this can be difficult to diagnose. For all intents and purposes, the vehicle’s PCM (powertrain control module) has recognized too much fuel and not enough air at the post O2. The O2 sensor(s) provides this information to the PCM. A scanner with parameter capabilities will be necessary to accurately diagnose the problem.

The long term fuel trim(s) will show whether the PCM is attempting to correct any condition in fuel delivery. Driving the system lean or rich to compensate for the information provided by the O2 sensor(s). This parameter is in percentages and mid-range is 10-12%. Above the mid-range, the PCM is driving rich. Below the mid-range, the PCM is driving lean. The O2 sensors generate their own voltage 0-1volt, based on oxygen content in the exhaust. Above .5volt indicates rich (low oxygen content). Below .5volt indicates lean (high oxygen content). The pre-catalyst O2 sensor need to be operational and accurate before condemning, the post-catalyst O2 sensor.

It could be, a faulty O2 sensor. It could be, a connection or wiring harness fault, It could be, a faulty PCM. I recommend having your vehicle’s P2097 trouble code diagnosed and repaired by a certified technician, such as one from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: how hard is it to change 2013 Chevy Captiva Sport Camshaft Position Sensor L4 2.4L

Hi there. Like any other mechanical repair, the definition of 'easy' is relative based on the level of experience you have, access to the correct tools and detailed instructions. If you're going to replace this component, I would highly recommend...

Q: My Jeep starts for a couple of minutes but it wont stay running.

Hi there. If the engine is trying to start up and not staying on then the fuel could be jelled up in the fuel tank at the temperatures outside if there is excessive water in the fuel. I recommend putting...

Q: Car says energy power reduced then engine light came on

The first thing to do would be to have the Check Engine Light trouble code pulled from the car for a place to start. Common problems are things like a faulted throttle body motor or throttle body position sensor which...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.