P2096 OBD-II Trouble Code: Post Catalyst Fuel Trim System Too Lean Bank 1

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

EXCELLENT RATING ON

Cost of diagnosing the P2096 code

P2096 is a diagnostic trouble code (DTC) for "Post Catalyst Fuel Trim System Too Lean 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 $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 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 $154.99 $50.0
Toyota $154.99 $50.0
BMW $164.99 $50.0

*Estimates may vary by market

SCHEDULE P2096 DIAGNOSTIC Get a fair and transparent estimate upfront

P2096 trouble code definition

In the simplest of terms, the P2096 fault code indicates the Powertrain Control Module (PCM) has received data from the oxygen sensors in the exhaust system that there is an excess of air and shortage of fuel within the number one cylinder.

What the P2096 code means

This OBD-II trouble code means the air to fuel ratio is suboptimal, or lean. In response to the registration of this fault code, the computer signals the addition of fuel to the mixture to correct the lean condition.

What causes the P2096 code?

While several conditions can cause the P2096 trouble code to register, a common cause is an leak in one of the hoses/lines, which introduces extra air into the system. A cracked exhaust manifold or damaged gaskets or o-rings can also introduce too much oxygen.

If the cause of the air to fuel ratio imbalance is not due to the seepage of more air into the system, it must by default be caused by limitation of fuel movement. Issues restricting the flow of fuel that can trigger the P2096 code include failing fuel pumps, clogged filters, and damaged fuel pressure regulators.

When the P2096 code is accompanied by a code like P0420, the catalytic converter is a likely culprit. In the case of both the P2096 code and P0100 code registering, it is advisable to look to the mass airflow sensor as a probable cause.

What are the symptoms of the P2096 code?

In addition to the P2096 code triggering the illumination of the Check Engine Light, the following symptoms may be noticeable:

How does a mechanic diagnose the P2096 code?

The first step for a mechanic in diagnosing the root cause of the P2096 trouble code is to verify its existence. This is done using a specialized scan tool, which connects to the vehicle’s computer. This tool scans the data about the vehicle’s operations within the computer, detecting any variables that lie outside of accepted parameters. Any anomalies show up as an OBD-II trouble code. If the P2096 code registers on the scan tool, which is greater in capability than those found in auto parts stores, then the code is likely valid, and the mechanic can begin troubleshooting the issue.

From here, the technician usually performs a visual inspection of the exhaust system, looking for any noticeable damaged or worn components. The mechanic may also test drive the vehicle while being alert to any signs in its performance that can narrow potential causes of the P2096 code registering further.

Further inspection of vacuum lines, wiring, and sensors may be necessary. Once any repairs have been made, the mechanic will then run another scanning tool test to ensure those efforts have satisfactorily resolved the issue. If the code continues to register, the technician will run through the steps again.

Common mistakes when diagnosing the P2096 code*

After the P2096 code has registered, technicians should be wary of the following mistakes:

  • Failing to verify the existence of the P2096 code
  • Failure to clear the P2096 trouble code once repairs have been made
  • With Jeeps and Chryslers, it is advisable to thoroughly inspect the electrical connectors while under the hood because they tend to wear easily; while the pressing issue concerning the P2096 code may be resolved, these connectors may also need replacement.

How serious is the P2096 code?

While it is possible to continue driving a vehicle that has registered the P2096 code, the continued exposure to an improper fuel mixture can soon cause problems with other components within the exhaust and other systems. Therefore, it is in an owner’s best interest to seek an inspection and repairs as soon as possible.

What repairs can fix the P2096 code?

Once a mechanic has confirmed the validity of the P2096 trouble code, the following action(s) may be in order:

Additional comments for consideration regarding the P2096 code

Whenever diagnosing the cause of the P2096 OBD-II trouble code, bear in mind that the process takes time and may require multiple tests to identify the specific cause of a too lean fuel mixture. The investment of this extra time and labor up front helps to ensure that not only the root cause is detected and fixed but also that any other components that have been adversely affected are also repaired or replaced.

Need help with a P2096 code?

YourMechanic can connect you with a mobile repairperson who can come to you if needed and diagnose your P2096 OBD-II trouble code. Receive a quote and book your appointment online or speak with a representative at 1-800-701-6230.

Check Engine Light
oxygen sensors
Cylinders
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2096 code.

SCHEDULE P2096 DIAGNOSTIC
Get a $50 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(8600)

Rating Summary
8017
273
65
46
199
8017
273
65
46
199
 at YourMechanic

Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
 at YourMechanic

William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
 at YourMechanic

Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
 at YourMechanic

Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


More related articles

Related questions

My wife's car is jerking while switching gears, and got codes P0700 and P0765 from check engine light
Based on those fault codes, there is a faulty shift solenoid. The lack of acceleration is probably due to the transmission going into a failsafe mode. You may want to get a mechanic to look at the transmission to prevent...
Engine light is on+ VSC Trac lights
The "VSC Trac light on" problem is related to a software problem with the yaw rate sensors calibration. This is documented in Toyota Technical Service Bulletin (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-tsb-to-diagnose-and-repair-a-car-by-valerie-johnston) TSB #BR005-03, which your Toyota service center can apply to re-calibrate this sensor....
Fuel injection issue - 2005 Buick LaCrosse
Hi there. Your vehicle has a sequential fuel injection system. When the computer detects a fault, it converts to port fuel injection (bank to bank/limp mode). The most likely cause could be an electrical short in the odd bank of...

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