check engine light=low injector volt. - Ford Powerstroke Diesel Forum
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Old 09-11-2008, 11:35 AM Rookie

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check engine light=low injector volt.

my check engine light came on the day. got it checked at the local auto parts store. says it had 8 codes. low injector voltage. 1 for each cylinder. right before the light came on it stumbled, but only for a sec. and it has been fine truck is a 05 6.0l automatic.
wanting to know if it is something to worry about or just wait and see if it happens agian. also it has 67k miles. no other problems.
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Old 09-11-2008, 01:26 PM

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The injectors on these are known to go bad. My Ford dealership just replaced 7 of mine on my 04 with 75k however my truck did not throw a cel.

Bring it down to the dealership and have it taken care of, that's what the warranty is for.
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Old 09-11-2008, 09:19 PM
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Since the code is showing up for all 8 cylinders, it's more likely an FICM related problem. It sounds like it's not producing the full 48 volts that fire the injectors. It's gonna be pretty hard to diagnose yourself, though, without at least having a scope. Those pulses are pretty quick(I think like 800 microseconds), so you're not gonna see them with a meter. I'd wait for one of the techs to chime in on this one. You might also check the voltage at the batteries. On the 7.3, you could get similar codes from the IDM from having low primary voltage. I'm assuming the 6.0 might be vulnerable to the same thing. I think the IDM is integrated into the FICM on the 6.0, though.

Last edited by tech10002; 09-11-2008 at 09:31 PM.
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