Fixed 02 RAM 1500 4.7 IT'S BACK

God bless you my brother's and sister's.
The ram is back the oil pressure is fine and truck seems to be running fine but the engine light is on. I pulled codes on it and get p0171, p0455, p0202, p0123 and p1281. The truck needs to pass smog in California, here is the freeze frame code and pending code all help is greatly appreciated thank you.

This is potentially 5 completely separate problems, and I would tackle each one individually. Maybe start with the injector fault code. How does the truck run? Is there a misfire?

God bless you my brother's and sister's.
Hey SniperDan the truck is running good the owner said it ran a little rough in the morning. I will check that out this morning, I also think I should start with the injector thank you. In did not feel a misfire when it got here .

Hey Gilbert! I'm pumped to hear this thing still has good oil pressure.

I say you should feel free to skip the P1281 and P0455 for now. It'd be cool to tie the lean code and the injector together, but they're on opposite banks.

I'm with Dan about chasing the injector code first. Does this have a remote start? I see those crappy ScotchLock connectors causing injector codes all the time. The running rough in the morning, and the cold ECT in the freeze frame, kinda makes me wonder about leaking intake runners...

I was thinking the same as tyler the lean code and injector code aren't on the same bank. im wondering if the p0455 is playing a role at all. maybe the purge valve is sticking open.

but since it runs a little rough in the morning I would suspect an intake gasket more though

I thought similarly on tying the P0455 and the P0171, but this being a speed density engine it is doubtful. In fact, i highly doubt that a vaccuum leak is playing a part in any of these fault codes, though it could be contributing to the roughness on cold start. A purge solenoid that was stuck open or any vaccuum on this setup would be expected to cause a high idle, and subsequently a P05 series fault code, and wouldnt have a hige affect on fuel trims. Knowing Chrysler, I'd be willing to bet we have some sort of an oxygen sensor issue contributing to the P0171, though I'll admit this is purely speculation with no founding on applicable data. Speaking of data, think you can get some captures? Particularly fuel trims, loop statuses, and oxygen sensors to see what we are working with.

SniperDan wrote: I thought similarly on tying the P0455 and the P0171, but this being a speed density engine it is doubtful. In fact, i highly doubt that a vaccuum leak is playing a part in any of these fault codes, though it could be contributing to the roughness on cold start. A purge solenoid that was stuck open or any vaccuum on this setup would be expected to cause a high idle, and subsequently a P05 series fault code, and wouldnt have a hige affect on fuel trims. Knowing Chrysler, I'd be willing to bet we have some sort of an oxygen sensor issue contributing to the P0171, though I'll admit this is purely speculation with no founding on applicable data. Speaking of data, think you can get some captures? Particularly fuel trims, loop statuses, and oxygen sensors to see what we are working with.

Oooh, good thinking here, sir! Chryslers are slaves to their O2 sensors, after all.

God bless you my brother's and sister's.
Hey Tyler I'm happy to say that the oil pressure is good thank God. This truck has no remote start, pending codes are p0133 and p0442. I checked the injector and I have battery voltage when running and pulse on signal wire. I do hear the injector,I also did a cylined drop test and hear no change on cylinder 2 I do have good spark. Cylinder 4 drop test truck almost stalled. I have a External Multiscope but I don't know how to set the settings to get a good wave pattern.
SniperDan I will try to get those shots tomorrow for you thank you all for your help.

So just so I understand, cylinder drop test indeed revealed no contribution from cylinder 2, correct? If this is the case, seeing as how you have already verified injector pulse and a good feed to the injector, I think the next easiest thing to do would be a simple ohm measurement through the pins of the injector. My suspicion is that it is open. If the ohmeter disagrees and you have a resistance in a normal range, I would hit it with the trusty amp probe to see what indeed is going on with it's winding. You could also scope the control on the voltage side, either capture would be useful. As far as setup...

Amperage setup- 20ms sweep, 5 amp scale, peak detect on, invert on depending on amp clamp polarity/position. You can install the clamp on either the feed or control wire, it matters not.

Voltage setup- 20ms sweep, 100v scale, peak detect on, no inversion neccesary, negative lead on the battery negative, positive lead backprobed in the injector control wire.

As far a listening to the injector to hear if it is clicking or not, in my opinion it isn't fool proof. I have put a stethoscope on non functional injectors in the past and thought for certain I heard them clickity clackin' there cute lil' hearts out, but upon further investigation found that they weren't actually firing at all. Fuel rails tend to be excellent microphones, and you'll often hear the firing of other injectors loudly on the injector your listening to. Not saying it isn't a good testing method, as I still do it from time to time, but just keep the variables of said test in mind.

God bless you my brothers and sisters.

SniperDan i took thees shops of the injector hope this helps. I was also looking at long and short trims with o2s and i noticed that bank 1 sensor 1 was not working. From experience i know that the o2s on thees truck can cause a lot of problems I'm going to replace the o2s and see what happens.

Is that B1S1 fixed lean all the time? Before replacing it, I would do signal circuit testing to confirm that signal is not shorted to ground. Simply unplug the sensor, and your scan tool should indicate 5v on this design. As for the other captures, I can't view any of them. Is there any way you can insert instead of attaching?

I would also add an alternative fuel source to the engine and attempt to drive this signal rich. We need to determine if this is an actual lean condition or if the O2 actually has a problem.

God bless you my brother's and sister's.
So I checked and replaced the 02 sensor and fuel trims are good thank God. As for the po455 the fuel cap was leaking. Brother I did insert the pics but they did not show up then I attached them and same thing.

gilbert wrote: God bless you my brother's and sister's.
So I checked and replaced the 02 sensor and fuel trims are good thank God. As for the po455 the fuel cap was leaking. Brother I did insert the pics but they did not show up then I attached them and same thing.

Nice! :woohoo: Should I call this one [FIXED] for now?

Looking back, seems like SniperDan suggested a bad O2 sensor on the first page, points to him.

God bless you my brother's and sister's.
It's been a week and it hasn't been back thank God.Im going to call this a fix. Bad O2's sensors.

Glad to hear it, sir!

Did this also end up passing emissions inspection?

God bless you my brothers and sisters.
I don''t know if it passed it has not been back though.
Thank you all for your help.

gilbert wrote: God bless you my brothers and sisters.
I don''t know if it passed it has not been back though.
Thank you all for your help.

No news is good news!