Is it safe to turn these codes off?

[Swarm]

I have P2097 & P2099 codes showed up, fuel limit high or something

I contacted Trifecta and they said :

"The fuel trims look perfect, they are very close to 0, which is perfect. It's not running too rich or too lean at all"

and I check there no leakage in headers or exhausts

so I have no idea why I get these codes, But I want to know if i can simply turn these off without having to worry about them

any input?

[kjkjr27]

have you tried just clearing them before actually turning them off? I would clear them and see if they come back. I believe the normal CEL for the headers doesn't involve the fuel limit.

[Swarm]

Originally Posted by kjkjr27

have you tried just clearing them before actually turning them off? I would clear them and see if they come back. I believe the normal CEL for the headers doesn't involve the fuel limit.

I did clear them off before, and they do indeed come back again after a 15-30 min of driving again.

[jkchambless]

Flash your car back to the factory tune to test.....if you are still having the problem take it to dealer....

[sycraft]

The most common concerns we have seen has been related to fuel injectors
Perform injector balance or AFIT test prior to going further.

If normal SI diagnostics does not lead to a resolution for this code, then look for a small leak in the exhaust, usually at the outlet to the engine converter.

This leak will allow air to be pulled into the exhaust and cause a false lean concern at the post O2 sensor.

To diagnose this leak we recommend applying air to the rear of the downstream converter or to the tail pipe on single systems @ 5psi to 8 psi.

Apply a soapy solution to the gasket areas and the O2 boss.

Leaks in these areas that will cause the code will be larger bubbles.
Foam leaks are considered normal.



DO NOT APPLY FULL SHOP AIR as converter and engine damage can result.

If available, CAC leak tester J-46091-1 and adapter can be used with a modification using wire ties to hold it to the pipe.



If a leak is found in these areas along with gasket replacement, filing the mating surface of the pipe is suggested.

If no leaks are found at this point you should look for a mechanical valvetrain concern such as a sticking valve, or a lifter follower off the camshaft out of place.

This may or may not cause a misfire.

DTC P2097Post Catalyst Fuel Trim System High Limit Bank 1
DTC P2099Post Catalyst Fuel Trim System High Limit Bank 2

Fuel trim bias is used to keep the post catalyst air/fuel ratio within a predetermined range. This allows optimal catalyst efficiency under light load conditions at a steady cruise. The engine control module (ECM) constantly monitors how lean or rich the fuel trim bias is commanded, to determine if the fuel trim bias is greater than a calibrated amount.

Conditions for Running the DTC•Before the ECM can report DTC P2097 or P2099 failed, DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, P0058, P013A, P013C, P013E, P0130, P0131, P0132, P0133, P0135, P0137, P0138, P014A, P0140, P0141, P0150, P0151, P0152, P0153, P0155, P0157, P0158, P0160, P0161, P2232, P2235, P2270, P2271, P2272, and P2273 must run and pass.
•DTC P0100, P0101, P0102, P0103, P0420, P0430, P0442, P0443, P0455, P0458, P0459, P2177, P2178, P2179, P2180, P2187, P2188, P2189 or P2190 is not set.
•The engine speed is 1,280-3,480 RPM.
•The engine load is 17-65 percent and steady.
•The closed loop fuel control is active for greater than 1 second.
•The calculated exhaust gas temperature is greater than 250°C (482°F).
•DTC P2097 and P2099 run continuously when the conditions above have been met for greater than 130 seconds.
Conditions for Setting the DTCThe rich correction limit for a condition causing a lean air/fuel ratio has been exceeded for greater than 4 seconds or for a cumulative of 30 seconds.

Action Taken when the DTC SetsDTCs P2097 and P2099 are Type B DTCs.

Conditions for Clearing the MIL/DTCDTCs P2097 and P2099 are Type B DTCs.

Diagnostic Aids•An HO2S will not cause this DTC to set without the occurrence of circuit related HO2S DTCs. Do not replace an HO2S to address this DTC.
•An exhaust system leak that may not be audible can set this DTC.