2019 Ram 2500 — when downtime matters more than repair cost — trying to narrow this down

OP update: scanned the 2019 Ram 2500 again and still only have the one pending code, no new lights. Doing the boring step first on purpose.

Log the conditions before you spend. Move a coil or plug on the 2019 Ram 2500 if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. On “when downtime matters more than repair cost,” that was the fork that mattered for me. Take it or leave it — that's what I'd do. This is me being the wet blanket on purpose.

Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2019 Ram 2500 and see if the fault moves. If the cheap test changes it, stop and reassess. I'd want a dollar figure or a measured spec, not 'should be fine.' Heat soak after errands is the other window.

I'd want a measurement, not a hunch. Loaded-suspension checks on the 2019 Ram 2500 catch play that a wheels-hanging inspection misses. You'll know quickly if you're on the wrong tree. Had a similar mess a couple years ago and that's what finally sorted it. If that fails I'll eat the diagnostic fee.

OP update: scanned the 2019 Ram 2500 again and still only have the one pending code, no new lights. Trying not to diagnose from the couch.

Log the conditions before you spend. Write temp, speed, and in-gear vs coast when the 2019 Ram 2500 does it — then decide on parts. That's the branch I'd chase this week. On “when downtime matters more than repair cost,” that was the fork that mattered for me. I'd want a dollar figure or a measured spec, not 'should be fine.' If your situation is the opposite, ignore me. Not driving it hard until I know more.

Ask what changed right before it started. Get a real battery/charging test on the 2019 Ram 2500, not just resting voltage, before blaming a module. That's the branch I'd chase this week. Run the total, not the monthly, before you commit. That's coming from doing this as an owner, not a shop. If it repeats twice more I'll book time.

Log the conditions before you spend. Move a coil or plug on the 2019 Ram 2500 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. On “when downtime matters more than repair cost,” that was the fork that mattered for me. A shop burned me once by skipping that step. If your situation is the opposite, ignore me. If the story changes I'll post the new data.

This is usually cheaper to test than to guess. If a shop can't duplicate it on the 2019 Ram 2500, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. Stop there until you know. A day of patience here is cheaper than a wrong part. Not interested in a five-hour wait for a shrug.

Start with the test that can prove you wrong. Write temp, speed, and in-gear vs coast when the 2019 Ram 2500 does it — then decide on parts. Don't erase codes until someone who can help has seen them. Stop there until you know. Parking it somewhere I can hear it better next time.

Intermittent stuff lies if you only catch it once. Two 2019 Ram 2500s can feel identical and have different causes, so measure before you copy someone else's repair. That's the branch I'd chase this week. On “when downtime matters more than repair cost,” that was the fork that mattered for me. Take it or leave it — that's what I'd do. That's my plan before I call anyone.

Start with the test that can prove you wrong. If a shop can't duplicate it on the 2019 Ram 2500, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. If they can't show the line item, I assume it's hiding. I'm keeping receipts and dates in one folder.

Checked the easy stuff on the 2019 Ram 2500 and found one clue worth chasing before I book a shop. I'd rather look cautious in this thread than stuck later.

Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2019 Ram 2500 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. On “when downtime matters more than repair cost,” that was the fork that mattered for me. I'd want that in writing, not as a promise. Not interested in a five-hour wait for a shrug.

I wouldn't throw parts yet. Capture voltage while the 2019 Ram 2500 is actually failing — after it restarts you've lost the clue. Save the big job until that test fails. Write the result down so the next test isn't a repeat of the last one. Parking it somewhere I can hear it better next time.

If it were in my driveway, a pressure test beats staring at a dry driveway if the 2019 Ram 2500 is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. Take it or leave it — that's what I'd do. Video is ugly but it shows the hesitation.

I'd want a measurement, not a hunch. Swap the cheap/easy piece first on the 2019 Ram 2500 and see if the fault moves. If the cheap test changes it, stop and reassess. That's the whole play. I'd sleep better after that step, even if it finds nothing. I'm in no rush to be a hero on it.

OP update: scanned the 2019 Ram 2500 again and still only have the one pending code, no new lights. Next check is the cheap one I can do in a driveway.

I'd want a measurement, not a hunch. Move a coil or plug on the 2019 Ram 2500 if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. Take it or leave it — that's what I'd do. Not interested in a five-hour wait for a shrug.

Ask what changed right before it started. Move a coil or plug on the 2019 Ram 2500 if it's cylinder-specific and see whether the code follows. Save the big job until that test fails. When does it actually happen? A day of patience here is cheaper than a wrong part. I'll update if anything new shows up.

If it were in my driveway, write temp, speed, and in-gear vs coast when the 2019 Ram 2500 does it — then decide on parts. You'll know quickly if you're on the wrong tree. Just my two cents from doing this recently. I'd sleep better after that step, even if it finds nothing. Cold start is when I can actually reproduce it.

Intermittent stuff lies if you only catch it once. If a shop can't duplicate it on the 2019 Ram 2500, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. On “when downtime matters more than repair cost,” that was the fork that mattered for me. Run the total, not the monthly, before you commit. I'm keeping receipts and dates in one folder.

I'd want a measurement, not a hunch. A pressure test beats staring at a dry driveway if the 2019 Ram 2500 is losing coolant with no puddle. If the cheap test changes it, stop and reassess. Had a similar mess a couple years ago and that's what finally sorted it. I refuse to clear codes until someone else sees them.

Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2019 Ram 2500 is losing coolant with no puddle. Save the big job until that test fails. Had a similar mess a couple years ago and that's what finally sorted it. I keep a notes app thread for this now.

Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2019 Ram 2500 is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. On “when downtime matters more than repair cost,” that was the fork that mattered for me. Had a similar mess a couple years ago and that's what finally sorted it. Not interested in a five-hour wait for a shrug.

I wouldn't throw parts yet. Swap the cheap/easy piece first on the 2019 Ram 2500 and see if the fault moves. You'll know quickly if you're on the wrong tree. Do that first. This is the version I'd tell a friend.

This is usually cheaper to test than to guess. Move a coil or plug on the 2019 Ram 2500 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. No need to make it theatrical. A day of patience here is cheaper than a wrong part. Not interested in a five-hour wait for a shrug.