CEL codes what the heck does P2096 and P2098 mean?? - Chrysler 300C Forum: 300C & SRT8 Forums
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Old 03-31-2010, 02:25 AM   #1 (permalink)
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CEL codes what the heck does P2096 and P2098 mean??

I've had my CEL on for a few months now, and had it checked out. The diagnostic codes are P2096 and P2098. Which means....Post Catalyst Fuel Trim System Too Lean Bank1 & Bank2. Now can anybody help explain it in ENGLISH. I've taken it 3 different mechanics and they all gave me 3 different answers or seemed to be guesses. I'm not sure who to trust and who to take it to get it fix. Any input would be great, thanks for the help.
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Old 03-31-2010, 07:14 AM   #2 (permalink)
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I couldn't find P2096, but here's P2098 out of the service manual. This is written to be used in conjunction with the Starscan tool, and is missing the diagrams, but it'll give the gist of what may be happening:


P2098-DOWNSTREAM FUEL TRIM SYSTEM 2 LEAN (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
When Monitored:
With the engine running in closed loop mode, the ambient/battery temperature above (-7C) 20F, altitude
below 8500 ft and fuel level greater than 15%.
Set Condition:
If the PCM multiplies short term compensation by long term adaptive and a certain percentage is exceeded for
two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored. Two Trip Fault. Three good
trips to turn off the MIL.
Possible Causes
EXHAUST LEAK
ENGINE MECHANICAL PROBLEM
2/2 O2 SENSOR
(K243) O2 2/2 SIGNAL CIRCUIT
(K399) O2 HEATER 2/2 CONTROL CIRCUIT
(K904) O2 DOWNSTREAM RETURN CIRCUIT
FUEL CONTAMINATION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1. ACTIVE DTC
NOTE: Check the vehicle repair history. If the 2/2 O2 has been
replace make sure that the O2 sensor was properly installed and
meets OEM specification.
NOTE: Check for contaminants that may have damaged the O2
Sensor: contaminated fuel, unapproved silicone, oil and coolant.
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Yes >> Go To 2
No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER
- 5. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/POWERTRAIN CONTROL MODULE - DIAGNOSIS
AND TESTING)
P2098-DOWNSTREAM FUEL TRIM SYSTEM 2 LEAN (CONTINUED)
2. EXHAUST LEAK
Turn the ignition off.
WARNING: To avoid personal injury from the exhaust system being hot, allow the exhaust to cool down to
a safe temperature before performing a physical inspection. Failure to follow these instructions can result in
personal injury or death.
Visually and Physically inspect for holes, cracks and blockage in the exhaust system.
Is the exhaust system is good condition?
Yes >> Go To 3
No >> Repair or Replace as necessary.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN CONTROL MODULE - DIAGNOSIS AND TESTING)
3. ENGINE MECHANICAL PROBLEM
Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from leaks
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector
Are there any engine mechanical problems?
Yes >> Repair as necessary.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN CONTROL MODULE - DIAGNOSIS AND TESTING)
No >> Go To 4
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Old 03-31-2010, 10:50 AM   #3 (permalink)
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Wow. that was long! thanks for your help. I guess i'll start by having my 02 sensors replaced and go from there. Thanks again!
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Old 03-31-2010, 11:21 AM   #4 (permalink)
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And, here's another long one for you on the P2096:

http://www.300cforums.com/forums/175544-post2.html
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Old 04-02-2010, 11:18 PM   #5 (permalink)
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Quote:
Originally Posted by BigSwanGin23 View Post
I've had my CEL on for a few months now, and had it checked out. The diagnostic codes are P2096 and P2098. Which means....Post Catalyst Fuel Trim System Too Lean Bank1 & Bank2. Now can anybody help explain it in ENGLISH. I've taken it 3 different mechanics and they all gave me 3 different answers or seemed to be guesses. I'm not sure who to trust and who to take it to get it fix. Any input would be great, thanks for the help.
BigSwanGin23, did you use any type of fuel additive recently or buy fuel from a different location? The car is lowered right? Could you have bottomed out on a speed bump and loosen the exhaust some?

Do you own a Predator tuner?

Helpful website for multiple code research: http://www.obd-codes.com/trouble_codes/
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Last edited by Keithyhome; 04-02-2010 at 11:37 PM. Reason: added website link
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Old 04-09-2010, 03:25 PM   #6 (permalink)
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Quote:
Originally Posted by BigSwanGin23 View Post
Wow. that was long! thanks for your help. I guess i'll start by having my 02 sensors replaced and go from there. Thanks again!
No!

Reset your computer and see if it comes back. Also throw a batch of premium fuel and some tecron in there and it might clean thigns up.
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Old 04-09-2010, 03:29 PM   #7 (permalink)
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get a predator and turn your rear o2 sensors off,it may be cheaper than replacing the sensors
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Old 04-20-2010, 12:51 AM   #8 (permalink)
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Quote:
Originally Posted by Ripper View Post
No!

Reset your computer and see if it comes back. Also throw a batch of premium fuel and some tecron in there and it might clean thigns up.
I tried resetting it, and used the fuel cleaner bottle, but still the light came back on the next day. I give up, I'm just going to drop it off to the "stealership" and have them rip me off, but at least they will fix it.
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Old 04-20-2010, 12:54 AM   #9 (permalink)
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Quote:
Originally Posted by Keithyhome View Post
BigSwanGin23, did you use any type of fuel additive recently or buy fuel from a different location? The car is lowered right? Could you have bottomed out on a speed bump and loosen the exhaust some?

Do you own a Predator tuner?

Helpful website for multiple code research: OBD-II Check Engine Light Trouble Codes

Yes my car is lowered, with Eibach springs and struts, I'll have to check the exhaust, I cut out my resonators as well, not sure if that made a difference. Also I dont have a predator, and i dont know how it works.

Last edited by BigSwanGin23; 04-20-2010 at 12:55 AM.
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Old 04-22-2010, 08:28 PM   #10 (permalink)
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Quote:
Originally Posted by BigSwanGin23 View Post
Yes my car is lowered, with Eibach springs and struts, I'll have to check the exhaust, I cut out my resonators as well, not sure if that made a difference. Also I dont have a predator, and i dont know how it works.
As mentioned above, a Predator tuner is a great investment and cheaper than new O2 sensors. With the tuner, you can turn-off the downstream O2 sensors which could be part of the problem, if not the cats themselves.

Take the time to check for exhaust leaks, especially where the header connects to the cat pipe.

Doubt the resonator delete will affect the measurements as they are way past all of the sensors (end of the line).

Let us know what the dealer says if you decide to take it there.

Last edited by Keithyhome; 04-22-2010 at 08:31 PM. Reason: additional response
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