2003 hyundai accent fault code- Crank Angle sensor PO355 Circuit A. What does circuit A mean?? No spark , no injector pulse. Have already replaced sensor.

Is there an RPM signal reading on the scan tool when the car is cranking? If there's no RPM signal, it's likely there's a problem with the crank sensor or cam sensor. An RPM signal usually indicates the two are good.

If you're getting an RPM signal, I'd back probe the injectors, and look into confirming you have good supply voltage, and a steady 12V on the injector control wires. I'm assuming the injectors are switched on by the computer ground.

If the voltage stays low or remains at 0v on the control wires, you have to look further into the circuit feeding the injectors. A wiring diagram would be best.

Tidied up the question a bit.
Question moved to sub category

Did the inability to start happen right after you put the new battery on? Did you reset the security system?

P0343 HYUNDAI Code Camshaft Position Sensor 'A' Circuit ...

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Repair Information for P0343 Hyundai code. Learn what Camshaft Position Sensor 'A' Circuit Range/Performance means, location and how to repair?

Dirty connections and grounds!

P0626 OBD-II Trouble Code: Generator Field/F Terminal ...

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P0626 means there's a fault on the generator field circuit due to a faulty alternator, battery, wiring, or poor communication between control module.

P0342 HYUNDAI Code Camshaft Position Sensor 'A' Circuit ...

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Repair Information for P0342 Hyundai code. Learn what Camshaft Position Sensor 'A' Circuit Low Input Bank 1 Or Single Sensor means, location and how to ...

injector pulse from ECU

the ECU will have fault codes stored internally to find the cause

would check other sensors first
crank angle sensor or cam angle sensor could stop the pulse
immobilizer

if the engine cranks over and has spark
ignition would be the last thing i would checkout

injectors get signal from ECU
so no pulse at the injectors ?
is the crank angle sensor and all other sensors ok

any chance you have a diagnostic tool
any other fault codes

HI If all fuses are fine,EML warning light in cluster not on, The problem aria in these models were IGNITOIN COIL PACK ,CRANK SENSOR and make sure that ENGINE TIMMING BELT has not broken. BE advised that a diagnostic check will be required .

Unless the vehicle does not start,has no spark,
no injector pulse or you never tested the crank sensor,
why would you replace it

In the block next to the crank shaft at front of motor

Trouble Code: P0722

A/T Pulse Generator 'B' Sensor Circuit Malfunction
Possible Causes:


Pulse generator 'B' (+) or (-) circuit is open or shorted to ground . Pulse generator 'B' is damaged or has failed. TCM has failed . TSB 01-40-006-1 (12/01) contains information about this code.

Trouble Code: P01529

Customer Snapshot Request Error
Possible Causes:


Transmission control module error. Check for trouble codes in the transmission control module. TSB 1-40-005 (3/01) contains information about this code. I have info. on these 2 codes,will search more for the others.

Try replacing the crank angle sensor i had a problem where my automatic 2000 accent x3 would stall when it warmed up and wouldn't start till it was cold again. its a common problem on x3's apparently, my new one cost me approx. $80. never had the problem again after replacing it.

Yes, the computer does retain fault codes. They can be retrived either with a scan tool or by using an analog volt meter. (Good luck finding one of those if you don't already own one.)
Volt meter method:
Find the diagnostic connector located next to the fuse lock under the left side of the dash
Connect the positive lead of the volt meter to pin 1 on the diagnostic connector.
Connect the negative lead to pin 12. Turn the ignition switch on and disclosure of the ECM memory will begin.
The ECM will output 12 volt pulses. There are long pulses and short pulses. The long pulses count as tens and the short pulses count as ones. Example: 3 long pulses and 2 short pulses means code 32.
If there are 2 or more fault codes in memory, they will be output one at a time in order of the code number from lowest to highest.

Code Description
_____________________________________________________
11 Oxygen Sensor or Circuit
12 Airflow Sensor or Circuit
13 Intake air Temperature Sensor or Circuit
14 Throttle Position Sensor or Circuit
15 Motor Position Sensor or Circuit
21 Coolant Temperature Sensor or Circuit
22 Crank Angle Sensor or Circuit
23 Top Dead Center Sensor or Circuit
24 Vehicle Speed Sensor or Circuit
25 Barometric Pressure Sensor or Circuit
41 Injector or Circuit
42 Fuel Pump Control Circuit
43 EGR Temperature Sensor or Circuit

With the key on,the fuel pump is only activated for 1 second,the off,until the vehicle is turned over again,then it will come on again,checking power to the fuel pump,is not easy to do,,I am thinking maybe the fuel pump is coming on,but the injectors are not pulsating,replace the crankshaft sensor ,it controls spark,and injector pulse.