Plz help me code error p2096?

Question

Hi
Plz can you help me
I have kia soul 2009 1.6l

Code error p2096
Freeze frame:
Fuel system state bank 1: cl,using ho2s
S.t fuel trimB1: -16.4%
L.t fuel trim B1: -18.8%
Intake m.a.p: 74 kPa
Rpm 1812
Ignition triming :6.5
Throttle position 16.5 %
Calculated load : 62.4%
Coolant temp. : 90 c
Commanded evaporative purge: 25.1%
Fuel level input: 90%
Load_abs: 0.5%
Eq_rat: 0.996
Tp_r: 9.4%
AAT: 31 c
Intake air temp: 67 c

Answer 1

P2096 is Post Catalyst Fuel Trim System Too Lean. Too much air in exhaust, and the freeze-frame tells why - 1812 rpm and 74 kPa (10.7 psia) means lift-throttle (identified as 16.5%) and the obvious source of excess oxygen is a vacuum leak. It is worst at closed throttle when the powerful vacuum drags in the most air and the throttle body supplies the least (10.7 psia is really low).

Answer 2

Means your running lean. Fuel trims are in the positive. Need to find out why your running lean.



Low fuel pressure, vacuum leak, exhaust leak

Answer 3

Thanks for the answer everyone...



1- after using the Fuel Injection Cleaner - Liqui Moly ( two packs of 300 ml size) and got the problem (after using a few day get start check engine light on).

2- I think that the O2 sensors failed.

3- but, I have in my car to two O2 sensors which one is causing the problem.

4- my spark-plug black (Carbon-fouled plug).

5- knock engine.



Counters car 20,000 km now, I think it was new car

which O2 sensor can causing the problem?

Answer 4

the S1 signal is advanced compared to the S2 controller value, P2096 is stored.



DTC Detecting Condition

** S1 : upstream oxygen sensor / S2 : downstream oxygen sensor



Signal Waveform & Data

If you release the accelerator pedal suddenly after engine running about 4000 rpm, fuel supply will stop for short period and the O2 sensor service data in the GDS will display values 200mV or lower. When you suddenly press on the accelerator pedal down, the voltage will reach 0.6 - 1.0 V. When you let the engine idle again, the voltage will fluctuate between 200 mV or lower and 0.6 - 1.0 V. In this case, the O2 sensor can be determined as good.



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Answer 5

Check for a small exhaust leak. That will trigger your code, providing the vehicle is running good. Other possible causes are O2 sensors, Cat. Convertor or pcm. You need to see how well your O2 sensors are switching and monitor fusl trim readings at speed as well as idle. Your best bet maybe to bring your car to an independent shop and have them do the diagnosis as opposed to causing yourself un needed stress and money throwing parts at it guessing. After the shop does the diagnostics then you can replace what it is that's needed saving you some money. Scanner reading requires experience and knowledge that few without that experience can do. Good luck and hope this helps.