Typical repair cost: $0–$4,500
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Diesels need both batteries strong — one weak battery prevents cranking on 24V systems.
Cold-start failure below 40°F — extended crank then fires with white smoke.
Common after fuel filter change — needs priming.
Codes P0087/P0088 — no rail pressure = no fire.
No crank signal = no injection event.
Don't crank repeatedly without rail pressure — you'll damage the starter and HPFP.
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