Yet another PA203 post.
 

I did my due diligence and searched for PA203 issues but couldn't find an answer for my particular question. Here is a freeze frame condition when the PCM threw the code. I'm not sure I'm understanding it right but Bank 2 Lamda voltage is significantly lower than bank one while the Lamda values for both banks are pretty much the same. This is telling me that the low voltage value is indicating a lean condition but the PCM is doing its job by adding fuel to reach a good Lamda value. So if what I believe I have learned from my limited research is air is being introduced into the system before the sensor indicating a vacuum leak somewhere. There is also odd values between bank 1 and bank 2 long term fuel trim values. I don't know if this suggests anything. But this is all my own hypothetical understanding so please look at the values independent of my assumptions. Oh and I cleaned the MAF sensor. Aside from all this I did read one thread that hinted that a 1800RPM hiss was common. I've had this hiss before the code but it is very annoying. Gives me the same reaction as fingernails on a chalk board.

By the way this P2A03 code is fairly new and came up long after the car was tuned. It's running The Administration cold air intakes and Motordyne ART cat deletes.

P2A03
O2 Sensor Circuit Range/Performance (Bank 2 Sensor 1)

Status of this DTC
Confirmed DTC

Engine state when the fault appeared
Freeze frame trouble code: P2A03
Fuel system status 1: Closed loop (using all oxygen sensor)
Fuel system status 2: Closed loop (using all oxygen sensor)
Calculated load value: 26.3 %
Coolant Temperature: 190 °F
Short term fuel trim Bank 1: 3.9 %
Long term fuel trim Bank 1: -2.3 %
Short term fuel trim Bank 2: 3.9 %
Long term fuel trim Bank 2: -1.6 %
Engine Speed - RPM: 2850.00 rpm
Vehicle Speed: 75 mph
Ignition timing advance: 60.0 °
Intake air temperature: 66 °F
Maf air flow: 2.250 lb/min
Absolute Throttle sensor position: 11.4 %
Oxygen sensor voltage bank 1 sensor 2: 0.640 Volt
Short term fuel associated to bank1 sensor2: 99.2 %
Oxygen sensor voltage bank2 sensor2: 0.400 Volt
Short term fuel associated to bank2 sensor2: 99.2 %
Time since engine start: 173 seconds
Distance travelled while MIL is activated: 0 miles
Lambda - bank 1 sensor 1 (wide range O2S): 0.994
Voltage - bank 1 sensor 1 (wide range O2S): 2.120 Volt
Lambda - bank 2 sensor 1 (wide range O2S): 0.984
Voltage - bank 2 sensor 1 (wide range O2S): 1.580 Volt
Commanded evaporative purge: 0.0 %
Fuel level input: 71.0 %
Number of warm-ups since DTCs cleared: 4
Distance travelled since DTCs cleared: 122 miles
Evaporative system vapor pressure: 0.00000 psi
Barometric pressure: 14.65 psi
Catalyst Temperature bank 1, sensor 1: 824.0 °F
Catalyst Temperature bank 2, sensor 1: 824.0 °F
Control module voltage: 14.080 Volt
Absolute load value: 26.7 %
Fuel/air commanded equivalence ratio: 1.001
Relative throttle position: 7.1 %
Absolute throttle position B: 11.8 %
Accelerator pedal position D: 15.7 %
Accelerator pedal position E: 15.3 %
Commanded throttle actuator control: 11.4 %
Engine run time while MIL is activated: 0 min
Engine run time since DTCs cleared: 151 min


Report generated with EOBD-Facile App compatible with iPhone/iPad

Loose bolts on the exhaust flange or a crack? Did you swap sensors to see if one is bad?