6 PCM codes...need some input

[Fordcowboy]

Truck has been acting wierd, so I pulled codes tonight. I got 6 total and some are explainable and expected, but looking for some input on a few.

P0238-Turbo Boost Sensor A circuit low input
P0471- EBPS circuit intermittent
P0475- EBPV error
P1316- Injector Circuit/IDM codes detected
P1670- EF feedback signal not detected
B1D6D- Body code

The EBP stuff makes sense, because I have a non EBP turbo with the plug disonnected, and EBP sensor disconnected, so not worried about that.

P0238- Turbo booost sensor A circuit low input. Is this saying my map sensor is shot? I do have a DI BRV, but that shouldn't have an effect as far as I know.

P1316- Injector Circuit/IDM codes detected. IDM problem? Need a new one? Upgrading if so. This makes sense with what I am experiencing with the truck...read below.

P1670- EF feedback signal not detected. WTF does this mean? Don't know if this is part of my problem or not?

B1D6D- Body code. WTF? Where are there any sensors on the body????

So the issue I am having is when the truck is cold. First thought was that it was missing HARD. That is how it felt driving, CEL light and shaking I can feel in the floor board, worse with more throttle, with reduced power. Then I noticed it correlated with transmission temp somewhat. If the trans broke 100 degrees it would start to go away. As soon as CEL goes off, truck is back to normal. So I started thinking a trans issue. But the IDM code makes me go back to the thought that it is missing. Honestly would be happy if it is an IDM problem, because then I can upgrade it, and that is by far cheaper than a trans issue. Right now it has a self modded E99 IDM.

So the other questions are, does the Boost code point to a bad MAP sensor?

What does the EF code mean?

And what the hell is the body code?

I know help on these un common codes is hard, but any input you guys have is appreciated.

 

[BigAlsPSD]

Have you ohmed out the wiring for the injectors to eliminate the IDM? or point to injectors? Kind of sound like worn injectors that are not firing until warmed up to me... Have you watched the oil discharge while running cold vs hot, or performed a BUZZ test cold vs hot. The BUZZ test will also tell what the 1316 code that the IDM has stored is, it could be injector open high or low.

View attachment GB_Tech_Bulletin_103_Ford IDM_Module_Replacement.pdf

 

[Fordcowboy]

Have you ohmed out the wiring for the injectors to eliminate the IDM? or point to injectors? Kind of sound like worn injectors that are not firing until warmed up to me... Have you watched the oil discharge while running cold vs hot, or performed a BUZZ test cold vs hot. The BUZZ test will also tell what the 1316 code that the IDM has stored is, it could be injector open high or low.

View attachment 3336

Haven't done anything other than pull codes. Injectors are less than a year old. Had cold temp's, colder than this in the last month or two, with no problems, just suddenly this pops up.

I will Ohm out wiring and try to get a buzz test done. Just felt like more of an IDM thing to me at first, considering it has 300k on it, while the injectors are fairly new.

What do you mean by watching the oil discharge hot vs cold?

Thanks for the info. Wasn't sure if an IDM code pointed to IDM for sure or if there were other possibilities.

 

[BigAlsPSD]

The IDM code can point to injectors or IDM, have you inspected your wiring harnesses that go under the valve covers(UVCH) they are known to work loose unless they are shimmed or have clips installed, which could be another possibility. I actually 2 weeks ago had an issue with what I thought was a bad IDM all wiring ohmed fine, but #1 would not buzz, come to find out my injectors less than 3 months old, the small screw that retains the armature plate had loosened up and was giving a high to low open code. So I wouldn't rule out injectors. Personally before I threw $450 at a new IDM I would swap with a known good one.

The oil discharging from the injectors every time they fire can be observed by running with the valve covers off, and watching the oil come out of the spouts. One not discharging would point to an issue, same as one pissing oil(possible poppet issues) would as well.

 

[BigAlsPSD]

I've had the EF code a few times before, something to do with the feedback test not completing, I've cleared it and it wouldn't come back so I didn't dive in deeper, but it could be an IDM issue as well.

And the body code, you would have to enter that section of the diagnostic tool to view the code stored for the body(ABS,PATS, etc)

 

[Fordcowboy]

The IDM code can point to injectors or IDM, have you inspected your wiring harnesses that go under the valve covers(UVCH) they are known to work loose unless they are shimmed or have clips installed, which could be another possibility. I actually 2 weeks ago had an issue with what I thought was a bad IDM all wiring ohmed fine, but #1 would not buzz, come to find out my injectors less than 3 months old, the small screw that retains the armature plate had loosened up and was giving a high to low open code. So I wouldn't rule out injectors. Personally before I threw $450 at a new IDM I would swap with a known good one.

The oil discharging from the injectors every time they fire can be observed by running with the valve covers off, and watching the oil come out of the spouts. One not discharging would point to an issue, same as one pissing oil(possible poppet issues) would as well.

Awesome. At least I now have a place to start looking and digging deeper. I will Ohm when I get a chance and pull VC's to check there. Will also try to find a good IDM just to try out.

 

[BigAlsPSD]

Sounds like a great plan to properly diagnose, good luck to you.

A quicker check of the injector wiring and possible UVCH issues would be to ohm out the pins at the 9 pin connector on the top of the valve cover. Center pin to each of the 2 pins furthest forward and aft would check injector solenoid wiring, and should be less than 5 ohms, usually around 3. The pins in the connector would be

FRONT

Injector
Injector
GP
GP
Common
GP
GP
Injector
Injector

BACK

 

[Fordcowboy]

Haven't had a chance to do any testing yet, but thought of some things that I didn't hit on in the first post. Don't know if it changes anything or rules anything out, but figured I would add it anyhow.

Truck starts up and idles normal, the issue comes after driving for a bit. When I said cold in the first post, I more so meant, after it has been sitting for 8+ hours. It only happens towards the beginning of the first start up after sitting. If I am running around town or on a longer drive, it doesn't re-occur.

This morning it was 7* when I started the truck. Let it warm up 15 minutes, everything was normal. Drove halfway to work, right about 15 more minutes, with no issues. Then taking off from a stop light, as soon as I hit the throttle to take off, CEL came on and it started missing. Stayed on for about a minute, then went off. Stayed off for about 30 seconds, then back on, It did this for about 5 minutes total, and then everything was back to normal. I did notice that the CEL would come on while I was on the throttle, and then if I let off and started coasting CEL would go off shortly after, then hit the throttle again, CEL back on. So it is definitely related to putting a load on the motor.

The reason I thought it might help narrow it down is because injectors and oil should have been warmed up by the time it happened this morning. Truck had been running for 30 minutes total, 15min idling, 5min through town a bit, and 10min on highway. Engine temp was up to normal.

It would seem like this would rule out mechanical injector problems. I would think UVCH or loose wiring would occur more often or more randomly, not just a few minutes into the first drive after siting a while, and then not happen again. I don't know if a faulty IDM would have that much of a pattern to it or not?

I am still going to do all the diagnostics mentioned above as soon as I can, and see what I can find out.

 

[BigAlsPSD]

Definately better info, I believe it still could be wiring or IDM related, inspect the wiring going over the driver's side valve cover below the 42 pin connector, they are known to chafe there too.

What were the codes from the CEL? Or is it the SES light that is coming on?

 

[Fordcowboy]

Been busy at work and out of town a bit, and with a spare vehicle the truck has been sitting, but I've had some time here and there to test some stuff out, just kept forgetting to post in here.

It is the SES light, I just always seem to put CEL.

Since it was pretty intermittent, testing wiring was a pain. Motor was usually well up to temp, and I was on the highway when it would start usually. I would try to catch it, when it was acting up, but wiring would test ok. So I got a good IDM just to see what that would do. By the time the IDM showed up SES light was constantly on, so I could also test wiring better. Good IDM, same problem, so I tested wiring again while I was in there with the IDM.

At the IDM connector, all 8 cyls were out of range on Ohms.
Drivers bank was between 4.8 and 8.9.
Passengers bank was all around 6.5, except #5 with no reading.
All wiring on top of motor looks to be good.
Didn't have time to pull valve cover, but that's what's next. Probably replace both sides, and see where I am. I don't know how old this set is, so I might as well.

Now I'm wondering why all cyls were reading high? Just old worn out UVCH?

 

[BigAlsPSD]

Sounds like the best place to start is going under the vc's.

You could test for resistance at the UVCH without the injector harnesses connected to try to isolate, but if I was going in, I would probably preemptively replace all harness to not have to worry down the road, maybe you will find a broken wire for #5 which would cause your hard miss too, if not you could have broken solenoid coil wires or bad injector.