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Old 10-07-2022, 06:33 PM   #1
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Question no fuel injector pulse

i have 09 aura xr 2.4 eco no start fuel pump is priming up 55psi of pressure it has spark to the plugs with noid light i have no injector pulse cranking the engine i can feed a little fuel through throttle body car will run until fuel is burned fuses good inside trunk and under hood do have p0011 p0012 all 4 injector codes p201 p202 p203 p204 hard to believe all 4 injectors bad when they're not even receiving a signal from pcm maybe someone can point me in the right direction
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Old 10-09-2022, 07:11 AM   #2
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2008 AURA XE
Default Re: no fuel injector pulse

I haven't dealt with this issue before but when injector codes are set, the associated injector is disabled. The codes get set if the ECM read an open circuit in the injector for more than 2 seconds. This will stop the ECM from issuing injector pulses.

It's odd that all injectors have the same code. Are you sure that you have power to them? If you do, you could have a faulty ECM.

Try these steps from Service Manual...

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at a fuel injector.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 or A and ground.
‹› If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the fuel injector.

You can also check the resistance of each injector.
If they test good, between ~10-20 ohms then you either have a wiring problem between the injectors and ECM, which would be strange or a bad ECM.
This injector diagram is not for your car but is representative of the circuits involved...
2008 Saturn Aura XE 3.5L 4 spd (Retired)
2000 Saturn SL1 1.9L SOHC (Retired)
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