Jeep grand cherokee throwing code po204 p0203 ckt fuel injectors what is the cause

code p 0443 refers to evaporative emission (EVAP) canister purge valve ---circuit malfunction====causes ---wiring--- EVAP canister purge valve ---ECM
code p0308 refers to cylinder 8 ---misfire detected ====causes ---engine mechanical fault ---wiring----ignition/ fuel system--- injector---ECT/MAF sensor---ECM
I am thinking here that it restarts , not after cooling , but after the vacuum in the fuel tank has lessened and allowed fuel to be pumped to the injectors and the fuel pressure is re-established
if that is the case then a weak injector or partially blocked injector will misfire under those conditions
I would fix the purge valve so that the tank vents properly and the rest may go away

PO204,205 are injector circuit malfunction,PO174 is a system lean code, PO175 is system rich code, PO138 is heated oxygen sensor bank1 sensor 2 circuit high voltage, PO158 is heated oxygen sensor bank2 sensor 2 circuit high voltage. This is a repair for your mechanic. When they fix the injector and o2 circuits the rich lean codes will also be repaired. Continued driving will ruin your catalytic converter. Good luck

I hate to say this but it could be the fuel pump. Some times they are bad out of the box. Take it back in and replace it with another one. If that doesn't fix it start troubleshooting the rest of the fuel system. Injectors, Sensors etc. is throwing any codes?

P0113 intake air temp voltage too high
P0123 Throttle position sensor voltage too high
P0203 is injector #3 control circuit
voltage is higher that 4.9 volts short to 5 volt supply circuit

erase the codes and drive vehicle to see if the codes come back if they do you have a hard code check the supply circuit for a short

PO 203---Injector Circuit Malfunction-Cylinder #3

Hello.. looks like you are getting good fuel delivery. Is the fuel curve mixture on the scanner in specs? How is the timing, the timing chains on these engines will stretch and throw the timing off causing a ping and missfire -- a weak valve spring is something to consider. Also, the PCM may be faulty. I hope this helps.

codem p 0203 refers to injector 3---circuit malfunction===causes wiring--injector--ECM
chweck for harness connection , bad wire for no 3 injector or corroded pins for no 3 injector in the connection

Check spark plug wires for corrosion

p0203 injecter circuit malfunction cyl #3. p0204 injector circuit malfunction cyl#4. po138 02 sensor circuit,high voltage cylinder bank no.1,sensor no.2

douple ck all the ground wiresto engine,trans bell housing ,battery or frame/firewall look for any that may have separated from any pack of wires or broken off eyelets then thightnen all points,,.these grounds are very important to comp/injection controls and can cause a multi code problem like yours.