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  #1  
Old 12-11-2006, 06:41 PM
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Got Codes...:(

P0478....PCM has determined that the signal from the exhaust pressure control valve is to high for the current operating conditions.


P1211....injector control pressure sensor above/below desired levels


suggestions on where to start. I'm not to concerned about the first one, but the second one worries me a bit.

thanks guys !
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Old 12-11-2006, 06:46 PM
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first one im not sure about off the top of my head...

second one was probably set by your 10k or 18k mod
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Old 12-11-2006, 06:49 PM
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Quote:
Originally Posted by Marc View Post
second one was probably set by your 10k or 18k mod
...well if I had the 18k or 10k mod, that may be the case...LOL my 18K mod is still sitting here on my desk...........
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Old 12-12-2006, 02:32 AM
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Quote:
Originally Posted by gcop View Post
P0478....PCM has determined that the signal from the exhaust pressure control valve is to high for the current operating conditions.


P1211....injector control pressure sensor above/below desired levels


suggestions on where to start. I'm not to concerned about the first one, but the second one worries me a bit.

thanks guys !
i got the same codes my mechanic suggest me to start by changing the ICP
sensor so maybe it could help you
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Old 12-12-2006, 09:56 AM
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P0478 most likely you need a Exhaust back pressure sensor, or the tube going to it is plugged

P1211 if you have a chip, programmer, or module installed it will set that code and is normal

The EBP sensor on a 99+ is just above the waterpump, on earlier ones it is mounted on the backside of the HPOP resevoir, under the plastic engine cover
There are Pig tails that eliminate this code if you do not want to replace the sensor. But if you do the Exhaust back pressure valve will not work.
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Old 12-12-2006, 02:04 PM
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I'm thinking I'm just going to replace the sensor. I do have the TS chip installed, but it has been installed for 6-7 months now, so I don't think it is the cause of the 1211 code.

djsdiesel I appriciate you pointing the way for me, that will make it a bit easier.
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Old 12-12-2006, 03:06 PM
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I'm betting your chip is what caused it, if you talk to who you got the chip from they will probably tell you it is normal to see this code. Why did you check codes? Did your check engine light come on? If it did, did it come on under hard acceleration? I know when you buy an edge product in the back of the manual it gives a list of codes that is normal to see and the P1211 is one of them. Part of your chip programming is to up the ICP pressure.
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Old 12-12-2006, 05:07 PM
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I really don't think it's the chip. I have floored the crap outta this truck since the chip was installed about 7-6 months ago. I drive it set on 100HP. If the chip were the cause, I would think I would have seen the SES light long ago. I checked the codes because the SES showed up the other day when I started the truck up.

I'm thinking at this point the sensor is just bad.
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Old 12-12-2006, 05:15 PM
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Quote:
Originally Posted by gcop View Post
I really don't think it's the chip. I have floored the crap outta this truck since the chip was installed about 7-6 months ago. I drive it set on 100HP. If the chip were the cause, I would think I would have seen the SES light long ago. I checked the codes because the SES showed up the other day when I started the truck up.

I'm thinking at this point the sensor is just bad.
In my case the ses light turn on only on 50hp setting. I go wot on other settings no light but the engine sound change a bit turn the knob on 50hp the light came on
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