CEL With A Mess Of Codes?

[AK Bob]

Huh, is there another recommended tuner?

I'll order tomorrow.

The last 3 years have suuuuucked.

See my post in this link.

https://www.igotacummins.com/threads...-Tune-My-Daily

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[ddsneversummer]

See my post in this link.

https://www.igotacummins.com/threads...-Tune-My-Daily

Oof patience?

LOL alright.

I appreciate the help!

I'll test the batteries tomorrow and order the sensors in the meantime.

I'm assuming there'll be an announcement of some sort?

I don't want to miss something.

I'm not super forum-savvy.

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[AK Bob]

Oof patience?

LOL alright.

I appreciate the help!

I'll test the batteries tomorrow and order the sensors in the meantime.

I'm assuming there'll be an announcement of some sort?

I don't want to miss something.

I'm not super forum-savvy.

Yes, I will send you a link to any announcement in that regard.

You may need to upgrade to the Free Plus Membership.

https://www.igotacummins.com/threads...ership-(PLUS)!

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[ddsneversummer]

Yes, I will send you a link to any announcement in that regard.

You may need to upgrade to the Free Plus Membership.

https://www.igotacummins.com/threads...ership-(PLUS)!

I did that earlier today.

This forum rocks.

Reminds me of the Volvo forums (also super helpful and supportive).

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[ddsneversummer]

I am just keeping this up-to-date.

I did load-test the batteries- they checked out great.

Load testing the batteries/charging system while running showed it was weak, and my dad said I had 'dim headlights' the other night so I will replace the alternator.

I have also been going through the sensors and testing the voltage at the sensor (harness/plug side) and trying to test the resistance in the sensor itself; it is tough to find the expected values for the sensor.

So far, all of the sensors and plugs have checked out properly, and when I can't find the expected resistance, I try to grab values from the new sensor I have in case I need to replace it.

I hate grabbing the value from a supposed new one since that assumes it is good, but my options are limited.

I'm leaning on the alternator since it goes away on the 4th drive cycle if the engine has heat (even latent heat after sitting for a few hours).

I guess the alternator can't quite keep up on cold startup.

I also have the 'surging' issue similar to this post: https://www.igotacummins.com/threads...rging-At-Idle?

After reading that, it makes sense that the heating grid commands more power at idle, and the alternator can't keep up.

This leads to improper voltage readings at the PCM, causing the CEL/codes to stick around.

Anyway, I will keep posting info here and update the first post once this is solved.

Alternator is my next step, and then I will re-assess.

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[watersupply189]

I am just keeping this up-to-date.

I did load-test the batteries- they checked out great.

Load testing the batteries/charging system while running showed it was weak, and my dad said I had 'dim headlights' the other night so I will replace the alternator.

I have also been going through the sensors and testing the voltage at the sensor (harness/plug side) and trying to test the resistance in the sensor itself; it is tough to find the expected values for the sensor.

So far, all of the sensors and plugs have checked out properly, and when I can't find the expected resistance, I try to grab values from the new sensor I have in case I need to replace it.

I hate grabbing the value from a supposed new one since that assumes it is good, but my options are limited.

I'm leaning on the alternator since it goes away on the 4th drive cycle if the engine has heat (even latent heat after sitting for a few hours).

I guess the alternator can't quite keep up on cold startup.

I also have the 'surging' issue similar to this post: https://www.igotacummins.com/threads...rging-At-Idle?

After reading that, it makes sense that the heating grid commands more power at idle, and the alternator can't keep up.

This leads to improper voltage readings at the PCM, causing the CEL/codes to stick around.

Anyway, I will keep posting info here and update the first post once this is solved.

Alternator is my next step, and then I will re-assess.

I believe you may have possibly solved your problem with the alternator being weak and not keeping up with the electrical supply, causing all the other issues.

Fingers crossed.

What was the alternator output when you tested it?


2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

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[ddsneversummer]

I believe you may have possibly solved your problem with the alternator being weak and not keeping up with the electrical supply, causing all the other issues.

Fingers crossed.

What was the alternator output when you tested it?

2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

While running, my multimeter showed 13x (13.3) somewhere well under 14v).

Even the battery voltage screen on the dash only shows 13V.

I am surprised there isn't a dash light or CEL, considering it is showing so low.

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[watersupply189]

While running, my multimeter showed 13x (13.3) somewhere well under 14v).

Even the battery voltage screen on the dash only shows 13V.

I am surprised there isn't a dash light or CEL, considering it is showing so low.

It should be at least 14.1 or slightly higher.

It sounds like it’s on its last leg.


2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

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[ddsneversummer]

It should be at least 14.1 or slightly higher.

It sounds like it's on its last leg.

2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

I'm happy it acted up now, versus in a couple of weeks when the temp is around zero, hahaha.

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[AK Bob]

While running, my multimeter showed 13x (13.3) somewhere well under 14v).

Even the battery voltage screen on the dash only shows 13V.

I am surprised there isn't a dash light or CEL, considering it is showing so low.

I agree; I just did a cold start, 27*F.

My battery voltage held steady at 14.5 Volts.

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