How do i fix ecu on a volvo v70 2.4 petrol non turbo giving a misfire on No 1 & 2 injector current

0202 is injector on cylinder 2 , 0302 is misfire on cylinder 2.
Why did you change plugs, coil pack, wires, 02sensor when there is probably no/intermittant signal feeding injector 2.
Check for signal on the injector. If non, work backwards towards the ECU.

There is no "easy fix" as only 2 of the 4 codes are for the same thing...for the P0136 and P0141, its probably a bad Bank 1 sensor 2 oxygen sensor..the P0306 means cylinder 6 is misfiring (it could be bad spark plug, bad coil, bad injector, carbon on valves, low compression) and P1181 is showing a fuel delivery issue high pressure...as for the vibration, have all tires checked for balance and hum on passenger side is possibly a bad wheel bearing...and and all is best to have checked by your mechanic.

i would suggest checking all air intake pipe's/lines for any sign of cracking etc as this will alter the air intake and give a false reading to the ECU, also run a fuel addative through the fuel system, get one that covers the catalytic convertor as the o2 probes can get covered in burned carbon as well as getting the injectors clean , valves etc, keep me posted if you wish

code p0102 refers to MAF/VAF sensor ---low input ===causes --wiring short to ground. MAF/VAF sensor
code po172 refers to system too rich --bank 1=== causes ---intake blocked --EVAP canister purge valve---fuel pressure ---HO2S sensor
code po random misfires ---plugs --wiring ---injectors--low compression
code po305 refers to cylinder 5 misfire detected ===causes --engine mechanical fault--ignition/ fuel system ---injector ---ECT/MAF

I would check that the air filter is not blocked first as it affects the MAF/VAF sensors . Have a fuel pressure system pressure test done

I'm going to assume you have the 5 cylinder non-turbo engine.
You have coil - on - plug ignition which means you have a coil for each spark plug.
The miss could be a plug or coil, the injector, or something mechanical such as a valve.

P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

P0301 - Cylinder 1 misfire detected........P0302 - Cylinder 2 misfire deteced, and so on........so either it is a current misfire, which you would be running on 4 cylinders instead of 3, or it is an intermittent problem.......i will provide some possiblities,,,
- ignition system (spark plugs, leads, coil packs)
- fuel system (injectors, ecu etc)
- running out of fuel
- low compression

Basically, if your vehciel has not had service for a while, change the spark plugs, and engine oil, and give her some loving, tender care....

However, if it is regularly servicedm there might be a bigger problem.....

More info required to help you.

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shake at idle means u have a cylinder misfire or low commpression, here are causes of misfires most commonly seen.

The most common misfire causes on the cars I've worked on have been:

1. Spark plugs
2. Spark plug wires
3. Ignition coil
4. Fuel injector
5. Wiring to fuel injector
6. Timing Belt
7. Vacuum leak or stuck open EGR
8. Contaminated fuel or bad fuel pump
9. Weak compression
10. Blown head gasket

if petrol - spark plugs, air filter, fuel filter, throttle body clean, ignition timing check and adjustment, exhaust gas check, carburettor adjustment, valve tappet adjustment, ECU code check/scan. fuel injector clean.

if diesel- air & fuel filter, tappet adjustment, check glow plugs, scan ECU, drain sedimenter, may require injector clean and/or fuel timing adjustment.

if your car has a running problem get it diagnosed first.

Have you checked compression on non firing cylinders? Likely has blown head gasket between these two cylinders if located side by side.