Misfiring on cylinder 2+3,replaced oxygen sensor before cat and machine print out still shows oxygen sensor and is still misfiring.

code p 0141 refers to heated oxygen sensor (HO2S) 2 bank 1--heater control--circuit malfunction===causes --wiring---HO2S--- ECM
code p 0144 refers to heated oxygen sensor(HO2S) 3 bank 1--high voltage ===causes wiring short to positive ---HO2S---ECM
also refers to oxygen sensor(O2S) 3 bank 1--high voltage ===causes wiring short to positive---O2S-- ECM
HO2S sensors are the units in the exhaust manifolds or before the cat converters
O2 sensors are after the cat converter
two completely different operations
use the special tool for sensors as the wires are easily damaged from the wrong tool use
as for misfiring you will get a P0300 (0300,0301,0302,0303 etc) depending on which cylinders are misfiring
when checking for misfiring the injectors , (blocked or not firing) are as important as plugs and wires
If the misfiring continues after sensor replacement , replace the ECM with a known good one as it is common to all fault codes and misfiring

Bank 1 is always the sameside of the engine as the number one cylinder.
Bank 2 is always the other side of the engine.
Sensor 1 is always before the cat
sensor 2 is always after the cat.

Cylinder number 1 on this engine is on the drivers side. So bank 2 is the passenger side of the engine and sensor 1 will be located before the catalytic converter.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

430 is Oxygen sensor

0305 is misfire on cylinder 5

1320 is ignition coil.

The ignition coil is causing the misfire. That is causing rich mixture which could case the oxygen sensor issue. You need to work from the ignition issue to the sensor. The reason is if you replace the cat and the engine is running rich it will heat the cat up to the point that the car might catch fire. Oxygen sensors are also prone to fail after about 60 thousand miles.

the problem is the injector or injector wiring
oil can only get to the cylinder via the inlet and that will burn off or foul that plug
MAF/VAF will cause misfiring
the oxygen sensors to replace are the heated oxygen sensors in the exhaust manifold before the cat converter not the ones after the converters

coil

Here is the code list for the 1990 OBD1 system on your Acura.
Code 0 and 11 Electronic Control Module (ECM)
Code1 Heated oxygen sensor A
Code 2 Oxygen content B
Code 3 and 5 Manifold Absolute Pressure
Code 4 Crank position sensor
Code 6 Engine coolant temperature
Code 7 Throttle position sensor
Code 8 Top dead center sensor
Code 9 No.1 cylinder position sensor
Code 10 Intake air temperature sensor
Code 12 Exhaust recirculation system
Code 13 Barometric pressure sensor
Code 14 Idle air control valve or bad ECM
Code 15 Ignition output signal
Code 16 Fuel Injector
Code 17 Vehicle speed sensor
Code 19 A/T lock-up control solenoid
Code 20 Electric load detector
Code 21 V-TEC control solenoid
Code 22 V-TEC pressure solenoid
Code 23 Knock sensor
Code 30 A/T FI signal A
Code 30 A/T FI signal B
Code 41 Heated oxygen sensor heater
Code 43 Fuel supply system
Code 45 Fuel supply metering
Code 48 Heated oxygen sensor
Code 61 Front heated oxygen sensor
Code 63 Rear heated oxygen sensor
Code 65 Rear heated oxygen sensor heater
Code 67 Catalytic converter system
Code 70 Automatic transaxle
Code 71 Misfire detected cylinder 1
Code 72 Misfire detected cylinder 2
Code 73 Misfire detected cylinder 3
Code 74 Misfire detected cylinder 4
Code 75 Misfire detected cylinder 5
Code 76 Misfire detected cylinder 6
Code 80 Exhaust recirculation system
Code 86 Coolant temperature
Code 92 Evaporative emission control system

this is a picture showing the p0050 sensor is bank 2 sensor 1, hope help.

try this
ALLDATA Editor's Note: Always verify #1 cylinder location prior to diagnosis and repair.

- Cylinder bank number one is the bank that contains number one cylinder.


See: Firing Order


View & Print Options
Cylinder #1 on left side.

View & Print Options
Cylinder #1 on right side.

- The first oxygen sensor in cylinder bank # 1 is numbered O2 Sensor 1/1.
- The second oxygen sensor in cylinder bank # 1 is numbered O2 Sensor 1/2.
- A third oxygen sensor in cylinder bank # 1 would be numbered O2 Sensor 1/3.
- The first oxygen sensor in cylinder bank # 2 is numbered O2 Sensor 2/1.
- The second oxygen sensor in cylinder bank # 2 is numbered O2 Sensor 1/1.



- If a V-6 or V-8 vehicle only uses one downstream Heated Oxygen Sensor (HO2S) it is numbered O2 Sensor 1/2, even if it uses two upstream HO2S.
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P300 is random multiple misfire,301 is cylinder 1 misfire. 302 is cylinder 2 misfire & 306 is cylinder 6 misfire. P161 is a bad heater circuit in oxygen sensor bank 2 sensor 2. It is behind catalytic convertor. I would replace downstream oxygen sensor & clear codes. Run vehicle it may be all that is wrong.

Replace the Oxygen sensor. All your trouble codes are downstream of the oxygen sensor, and are related to it.

Once you replace the oxygen sensor (replace with a BOSCH sensor!), remove the positive battery cable, step on your brakes for 10 seconds, then reattach the cable. This will clear the codes from your ECM (Electronic Control Module).