There is a link below that provides a fairly good description but in addition it is worth noting, especially considering the age of the vehicle, it is wise to begin the troubleshooting by ensuring the fuel pressure and delivery volume is good and the injectors are spraying properly - large fuel droplets don't burn very well and although lots of fuel is being injected it can register as a lean mixture though as a basic code read is only the first step in a diagnostic process, this condition would be recognised as a rise in unburned hydrocarbons during the exhaust emission test...
https://www.obd-codes.com/p2096
SOURCE: 2004 Chrysler Pacifica Fluctuating Fuel Gauge Indicator
Hello, the answer to solve this problem is to take it to your nearest chrysler dealer and have them re-flash the updates to the ecu....since 2004, chrysler has had about 4-5 new updates since the date they were manufactured....you need to have the update that followed from your date of man. on your vehicle....They attempted to flash mine to the latest update and didnt work, turns out that they need the re-flash from back when...in order to get the gauage to stop fluctuating.....Hope this helps!!
SOURCE: i have a code p2096, post catalyst trim system too
put a new rear O2 sensor and it fixed it. Only problem you might have is if you have an aftermarket downpipe. If it is Catless then you are going to need some type of tune, opensource, Cobb AP, etc.... Even if it is a high flow cat then you will still need a tune because it will throw a code 75% of the time. If your stock cat is still on then replace your rear O2 sensor and that should fix it. Could be something else but mine was the exact same problem.
SOURCE: 2004 chrysler pacifica service tire system light
Make sure that your tire pressure sensors were not damaged. one simple way to check what tire sensor is causing the problem is to lower each tire individually and check to see if the message displays to a different tire or more than 1, depending on the TPM system your pacifica has. Chrysler has a TPM (tire pressure monitor) tester which can check each individual sensor for correct operation. and the sensor's batteries have typically a 5-7 year life span.
SOURCE: crankshaft position sensor location on 2004 chrystler pacifica
can u please tell me where on my 2004 chrysler pacifica is the crankshaft sensor located?
Trouble Code: P2096
Downstream Fuel System 1/2 Lean
Trouble Code Conditions: Engine running in closed loop mode. Ambient/battery temperature above 20F (-7C). Altitude below 8500 feet. Fuel level is more than 15%. If the PCM adds downstream short-term compensation to long-term adaptive, and a certain percentage is exceeded for 2 trips, a freeze frame is stored, the MIL illuminates and a DTC is set.
Possible Causes:
Exhaust leakEngine mechanical problemO2 Sensor has failedO2 Sensor signal circuit or return circuit problemFuel contamination
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