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2024 Land Rover Defender — dealer cannot reproduce an intermittent warning

HighwayScout41Community StarterJan 5, 20262024 Land Rover Defender 110 P400California
2024 Land Rover Defender 110 P400, about 26,500 miles. I have brought the car in twice for the same intermittent warning and both visits ended with could-not-reproduce. I have video and timestamps. What is the best way to build a useful paper trail? I am in California.
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20 replies

BoxerBuilder54Community StarterCommunity StarterJan 5, 2026permalink
This is usually cheaper to test than to guess. Swap the cheap/easy piece first on the 2024 Land Rover Defender and see if the fault moves. Don't erase codes until someone who can help has seen them. Learned this the expensive way on a previous car. If this is nothing, great. I want that in data.
HighwayScout41Community StarterCommunity StarterJan 5, 2026permalink
It did dealer cannot reproduce an intermittent warning twice this week, both times after sitting. No change in mileage feel. Wrote this up on my lunch break.
BatteryDetailerCommunity StarterCommunity StarterJan 5, 2026permalink
Log the conditions before you spend. Write temp, speed, and in-gear vs coast when the 2024 Land Rover Defender does it — then decide on parts. You'll know quickly if you're on the wrong tree. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. Verbal 'we'll take care of it' is not a plan. Might be overthinking it, but I'd rather overthink than overspend.
HighwayScout41Community StarterCommunity StarterJan 6, 2026permalink
OP update: scanned the 2024 Land Rover Defender again and still only have the one pending code, no new lights. I'd rather look cautious in this thread than stuck later.
CommuterWrench707Community StarterCommunity StarterJan 6, 2026permalink
Same neighborhood, different next step: Capture voltage while the 2024 Land Rover Defender is actually failing — after it restarts you've lost the clue. Save the big job until that test fails. Post the numbers (or the code) and people can get more specific. I'd sleep better after that step, even if it finds nothing. Happens in gear, not in park, for what that's worth.
QuietRoadie94Community StarterCommunity StarterJan 7, 2026permalink
That's a good start, but I wouldn't stop there. A pressure test beats staring at a dry driveway if the 2024 Land Rover Defender is losing coolant with no puddle. If the cheap test changes it, stop and reassess. Stop there until you know. If the story changes I'll post the new data.
NewCarPilot152Community StarterCommunity StarterJan 6, 2026permalink
I'd want a measurement, not a hunch. Two 2024 Land Rover Defenders can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. That's the sequence I'd use. I'd rather be boring and correct. I'd rather look cautious in this thread than stuck later.
TowGalCommunity StarterCommunity StarterJan 6, 2026permalink
Ask what changed right before it started. If a shop can't duplicate it on the 2024 Land Rover Defender, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. I'd want a dollar figure or a measured spec, not 'should be fine.' No warning lights, which is why I'm documenting it.
ColdStartOwner173Community StarterCommunity StarterJan 6, 2026permalink
This is usually cheaper to test than to guess. Loaded-suspension checks on the 2024 Land Rover Defender catch play that a wheels-hanging inspection misses. Don't erase codes until someone who can help has seen them. I'd want that in writing, not as a promise. Make the next action something you can finish this week. I keep a notes app thread for this now.
SleeperDetailerCommunity StarterCommunity StarterJan 6, 2026permalink
I wouldn't throw parts yet. Write temp, speed, and in-gear vs coast when the 2024 Land Rover Defender does it — then decide on parts. Save the big job until that test fails. If it doesn't change the out-the-door or the repair estimate, it's noise. Heat soak after errands is the other window.
QuietRoadie94Community StarterCommunity StarterJan 6, 2026permalink
Intermittent stuff lies if you only catch it once. Swap the cheap/easy piece first on the 2024 Land Rover Defender and see if the fault moves. You'll know quickly if you're on the wrong tree. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. Do that first. This is the version I'd tell a friend.
QuietRoadie94Community StarterCommunity StarterJan 6, 2026permalink
Start with the test that can prove you wrong. If a shop can't duplicate it on the 2024 Land Rover Defender, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. That's the whole play. Checking again after work.
NewCarPilot152Community StarterCommunity StarterJan 7, 2026permalink
Yes, with one caveat: Get a real battery/charging test on the 2024 Land Rover Defender, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. That's the sequence I'd use. Parking it somewhere I can hear it better next time.
BatteryDetailerCommunity StarterCommunity StarterJan 7, 2026permalink
Agree — and I'd add this: Get a real battery/charging test on the 2024 Land Rover Defender, not just resting voltage, before blaming a module. Save the big job until that test fails. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. I'd want that in writing, not as a promise. If that fails I'll eat the diagnostic fee.
HighwayScout41Community StarterCommunity StarterJan 7, 2026permalink
Tried a second charger / second scan and the story on the 2024 Land Rover Defender didn't change. Video is ugly but it shows the hesitation.
RotorBuyer115Community StarterCommunity StarterJan 7, 2026permalink
Quick add on that: Move a coil or plug on the 2024 Land Rover Defender if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. This is from a 2024 Land Rover Defender in California with 26,500 miles. Happy to compare notes if your setup is different. If this is nothing, great. I want that in data.
ManualDaily983Community StarterCommunity StarterJan 6, 2026permalink
I wouldn't throw parts yet. Write temp, speed, and in-gear vs coast when the 2024 Land Rover Defender does it — then decide on parts. If the cheap test changes it, stop and reassess. This is from a 2024 Land Rover Defender in California with 26,500 miles. I'd want that in writing, not as a promise. Only after sitting overnight so far.
NewCarPilot152Community StarterCommunity StarterJan 6, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2024 Land Rover Defender, not just resting voltage, before blaming a module. That's the branch I'd chase this week. That's the sequence I'd use. I'll update if anything new shows up.
NewCarPilot152Community StarterCommunity StarterJan 7, 2026permalink
Agree — and I'd add this: Two 2024 Land Rover Defenders can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. That's the sequence I'd use. Checking again after work.
RustBeltEnthusiast679Community StarterCommunity StarterJan 6, 2026permalink
If it were in my driveway, capture voltage while the 2024 Land Rover Defender is actually failing — after it restarts you've lost the clue. You'll know quickly if you're on the wrong tree. Happy to compare notes if your setup is different. That's my plan before I call anyone.
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