2022 RAM 2500

6.7L I6 Cummins Diesel4WDAUTOMATICdieselturbo
5-Year Cost of Ownership
$21,796 maintenance + known platform issues
~$4,359/yr · 360¢/mile equivalent · $6,427 maintenance + $12,449 expected platform issues
Compare this engine
vs
6.4L V8 Hemi Gas
Common Problems & Known Issues

The 2022 Ram 2500 is a capable heavy-duty truck split into two very different reliability stories: the 6.7L Cummins is generally bulletproof, while the 6.4L Hemi has catastrophic piston/bearing failures that can grenade the engine before 100,000 miles.

6.4L Hemi Catastrophic Engine Failure (Piston/Bearing/Lifter)

Common · high severity
Typical onset: 40,000-90,000 mi
Symptoms: Sudden metal-on-metal knocking or ticking from engine bay, Oil consumption jumps dramatically (1 qt per 500-1000 mi), Low oil pressure warnings, often with no visible leak, Milky coolant or coolant in oil (dropped valve seats crack heads), Complete loss of power, engine seizes
Fix: Full engine rebuild or replacement — pistons fail due to inadequate skirt design and oiling issues, dropping valve seats punch holes in pistons, lifter rollers fail and trash the cam. Many see total failure with no warning. Short block replacement takes 18-24 hours, full rebuild 25-35 hours depending on head damage. Often more cost-effective to swap in a reman long-block.
Estimated cost: $12,000-22,000

Transmission Oil Cooler Failure / Transmission Mount Collapse

Common · medium severity
Typical onset: 50,000-80,000 mi
Symptoms: Pink or milky transmission fluid (coolant cross-contamination from cooler), Harsh shifting, delayed engagement, or slipping, Visible transmission fluid leak near cooler lines, Clunking under acceleration or deceleration (mount), Excessive driveline vibration
Fix: The factory transmission cooler can internally fail, mixing coolant and ATF and destroying the transmission if not caught early. Requires cooler replacement (3-4 hours) and full fluid flush. If contamination occurred, transmission rebuild adds 12-16 hours. The transmission mount is undersized for the 6.7L Cummins torque and fractures, requiring replacement (2 hours). Many shops do both preventively on high-mileage units.
Estimated cost: $800-1,200 (cooler/mount alone), $4,500-7,000 (if trans damaged)

DEF (Diesel Exhaust Fluid) System Faults (6.7L Cummins)

Occasional · high severity
Symptoms: Check engine light with DEF system codes (P20EE, P204F common), "Reduced engine power in 50 miles" or countdown warnings, DEF gauge reads empty when tank is full, or stuck at full, Rough idle, limp mode, or engine derate to 5 mph
Fix: DEF quality sensor, heater, or pump failures trigger engine derate that can strand you. Sensor replacement is 2 hours, pump is 3-4 hours, full tank assembly 5-6 hours. Contaminated DEF (wrong fluid, old fluid, tank left empty too long) can crystallize and clog injector, requiring full system purge and injector replacement (8-10 hours). Always use fresh DEF and keep tank above 1/4.
Estimated cost: $600-1,400 (sensor/heater), $2,500-4,000 (pump/injector)

Backup Camera / Display Malfunctions

Occasional · low severity
Symptoms: Backup camera shows black screen, blue screen, or "Service backup camera" message, Intermittent camera feed cuts in and out, Uconnect display freezes or reboots randomly, Parking sensors give false alerts or stop working
Fix: Multiple NHTSA recalls address wiring harness corrosion at camera connector (tailgate side) and faulty camera modules. Dealer repair under recall is free and takes 1-2 hours. Outside recall, camera replacement is 1.5 hours, display module 2-3 hours. Check for open recalls before paying out of pocket — many '22s still eligible.
Estimated cost: $400-800 (camera), $1,200-1,800 (display module)

ABS/Traction Control Module Failures

Occasional · medium severity
Typical onset: 30,000-70,000 mi
Symptoms: ABS, traction control, and stability control warning lights all illuminate together, Speedometer drops to zero intermittently or stays pegged, Transmission won't shift out of 2nd gear (limp mode), Brake pedal feels normal but ABS doesn't activate in panic stops
Fix: The ABS control module and wheel speed sensors are failure-prone, often due to corrosion in connectors or internal module faults. Sensor replacement is 1-1.5 hours per corner, module replacement is 2 hours. A recall covers some ECU issues but not all failure modes. Diagnosis requires scanner with live data — don't throw parts at it blindly.
Estimated cost: $250-400 (per sensor), $1,400-2,000 (module)

Fuel Filter Clogging / Water Contamination (6.7L Cummins)

Common · medium severity
Typical onset: 15,000-30,000 mi intervals
Symptoms: Hard starting, especially in cold weather, Loss of power under load, surging, or rough idle, Water-in-fuel warning light (if equipped), White smoke from exhaust, fuel smell
Fix: The Cummins requires fuel filter changes every 15,000 miles (more often if running biodiesel or questionable fuel). Skipping this interval clogs the filter and starves the high-pressure pump, which can fail and cost $3,000+ to replace. Filter change is 0.5 hours, simple job. If water sits in the filter housing, it corrodes the filter head and requires replacement (1.5 hours). Drain the water separator every oil change as preventive maintenance.
Estimated cost: $80-150 (filter change), $400-700 (filter housing)
Owner tips
  • If buying a 6.4L Hemi, get a pre-purchase inspection with oil analysis and compression test — many engines fail suddenly with no prior symptoms. Extended warranty is highly recommended.
  • 6.7L Cummins: change fuel filters religiously every 15k, use quality DEF from high-turnover stations, and add a bypass oil filter system if towing heavy (extends engine life significantly).
  • Check for open recalls — the '22 has multiple safety-related campaigns for ABS module, wiring, and cameras that are free fixes at the dealer.
  • Transmission: service the fluid and filter every 60,000 miles even though Stellantis calls it "lifetime" — this transmission does NOT like old fluid, especially under towing loads.
Buy the 6.7L Cummins version with low miles and full service records; avoid the 6.4L Hemi unless you enjoy expensive engine rebuilds before 100k.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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