CEL unknown code?

[rideyama]

I have had P2187 on and off at random times since I added a catback to my downpipe and test pipe.

Down shifted to 5th last night at about 80mph, and floored it. Around 5800rpms it backfired like it used to do before I swapped out pump internals. Codes after that were P2096 and P2097
All of these codes show up as 'Unknown' on my dashawk.
Car runs great like always, and I drove almost 400 miles since with no problems.

Anyone know what these codes mean?

 

[mzdaspd3]

P2096 Target NF feedback system too lean
P2097 Target NF feedback system too rich

DTC P2096
Target A1F feedback system too lean
I I DETECTION CONDITION " I I, I I i I POSSIBLE CAUSE I 1
• The PCM monitors the target A/F fuel trim while under target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too lean. • Rear H02S sensor voltage is more than 0.1 V Diagnostic support note • This is a continuous monitor (Fuel system). • The MIL does not illuminate. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.

Possible Cause:
• Exhaust gas leakage
• Rear H02S malfunction IAT sensor malfunction •
• ECT sensor malfunction • Air suction in intake-air system • Front H02S malfunction
• MAF sensor malfunction
• Insufficient fuel line pressure
• Fuel pressure sensor malfunction
• Relief valve (built-in fuel delivery pipe) malfunction
• Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
• High pressure fuel pump malfunction
• Fuel pump malfunction
• Leakage fuel
• Improper operation ignition system
~Insufficient engine compression Fuel injector malfunction
• PCM malfunction


DTC P2097
DETECTION CONDITION
I
I
I
POSSIBLE
I CAUSE
I
Target A1F feedback system too rich
• The PCM monitors the target A/F fuel trim while under target A/F feedback control. If the fuel trim is less than specification, the PCM determines that the target A/F feedback system is too rich.
Diagnostic support note
•This is a continuous monitor. (Fuel system)
•MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•PENDING CODE is available if the PCM detects the above malfunction conditions during the first drive
cycle..' FREEZE FRAME DATA is available.
•DTCs are stored in the PCM memory.

Possible Cause:
•Exhaust gas leakage
•Rear H02S malfunction
•IAT sensor malfunction
•ECT sensor malfunction
•Front H02S malfunction
•Excessive fuel line pressure
•Fuel pressure sensor malfunction
•Relief valve (built-in fuel delivery pipe) malfunction
•Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
•High pressure fuel pump malfunction
•Fuel pump malfunction
•Purge valve malfunction
•Insufficient engine compression
•PCM malfunction

 

[pinchel]

Did you figure out what was causing the P2096?

 

[MSMS3]

Clear the code. drive it hard and see if it comes back. May have just been triggered by all that super rich raw fuel burning exhaust hitting the wide band 02 sensor when she back(after) fired. If it does not come back, don't worry about it.