P 0201 '03 HO

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FMB - 05 Jul 2006 22:10 GMT

I have gotten this code usually after (or during) WOT to get on the freeway.
Engine seems to run smooth when not excellerating but seems to miss at WOT
or even accellerating at less than WOT. P-0201 = Fuel Injector 1 Circuit.

I've cleared the code and the truck runs fine till I WOT a few times. It
doesn't always happen with the first WOT but it has occurred 3 times in the
past week.

Is there anything I should look at before taking it in to the dealer?
Almost 98k miles on it, original fuel pumps.

Along with that code I get the P 0633.

TIA
FMB

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Tom Lawrence - 06 Jul 2006 03:42 GMT

> Is there anything I should look at before taking it in to the dealer?
> Almost 98k miles on it, original fuel pumps.

Nah - you're still under warranty (just), so get it to the dealer before you
roll 100K, at least to get the problem documented. Anything
fuel-injector-related can run into significant $$$. Hopefully, you don't
have any aftermarket boxes or programmers installed, and can present a
completely stock engine to the dealership for diagnosis/repair.

> Along with that code I get the P 0633.

Do you have the Sentry Key system? (Big thick gray-handled ignition key) -
if so, it's not working. Tell the dealership about that, as well. That's
just a simple programming task to reset the encryption key in the PCM

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FMB - 06 Jul 2006 06:05 GMT

>> Is there anything I should look at before taking it in to the dealer?
>> Almost 98k miles on it, original fuel pumps.
[quoted text clipped - 11 lines]
> That's just a simple programming task to reset the encryption key in the
> PCM

Thanks Tom. I do have the big thick gray-handled ignition key. My
aftermarket items include pyro, fuel pressure and boost guages.

FMB

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