The 2016 Ram 1500 diesel shows a cluster of fuel system failures centered on the high-pressure fuel pump (HPFP) covered by recall 22V406000. Owners report the truck stalling without warning at highway speeds and city traffic, losing power mid-acceleration, and failing to restart—sometimes stranding them in dangerous positions. Stalls occur at 45,000 to 160,000 miles. Check engine lights frequently appear, sometimes with "motive power reduced" messages.
Fuel leaks are common, with owners finding fuel pooling under the vehicle and smelling strong fuel odor. In one case, a dealer's recall repair itself caused air intrusion into fuel lines, leading to stalling and a leak that required a second repair. A fuel gauge issue appears separately: the fuel level sensor reads empty when the tank is full.
The biggest complaint across 71 narratives is parts availability. Owners report waiting months or years for the recall part, with dealers confirming stock is extremely limited—one dealer stated the manufacturer supplies only one part per year. Many owners describe vehicles sitting at dealerships for five to six months while waiting. Owners also report acceleration hesitation, rough running, and an unusual humming sound when fuel levels drop.
After an EPA settlement update, one owner reports dangerous 2–3 second acceleration delays with no diagnostic codes, and the manufacturer refused to help, blaming the EPA requirement.
Failure modes owners describe
High-pressure fuel pump (HPFP) failure
The high-pressure fuel pump fails, causing loss of motive power, stalling, and inability to restart. The issue is tied to recall campaign 22V406000. Some cases involve pump replacement with dealer-sourced or aftermarket parts, which may also fail.
When: Varies; typically between 45,000 and 160,000 miles; failure timing ranges from startup to highway driving
Symptoms owners cite: Loss of motive power while driving; Vehicle stalling at various speeds or while idling; Failure to restart or extended restart attempts; Check engine light illuminated; Reduced acceleration or hesitation; Unknown warning lights displayed
Codes mentioned: P20EE, P016P
Repairs/costs cited: Fuel pump replacement needed; parts unavailable for extended periods under recall 22V406000. Dealer replaced pump multiple times in at least one case. Aftermarket pump replacement failed at highway speed in one case.
Recalls/TSBs owners mention: Recall NHTSA Campaign Number 22V406000 (Fuel System, Diesel). Parts availability delays cited across majority of cases. Manufacturer sometimes opened cases but provided no assistance. Some owners referred to dealer for diagnostics.
Fuel line leaks and fuel system contamination
Fuel lines leak, causing fuel odor and wet undercarriage. One case involved fuel line from HPFP to driver's side injector rail leaking after recall repair. Another case showed metal contamination in fuel system. Fuel tank straps corrode and detach in separate cases.
When: Approximately 22,500 to 120,000 miles; some cases after dealer recall repair work
Symptoms owners cite: Strong abnormal fuel odor; Fuel leaking from undercarriage; Puddle of fuel on ground while idling; Metal contamination detected in fuel system; Fuel tank strap corrosion and detachment; Abnormal humming sound when fuel level below half tank
Repairs/costs cited: Fuel lines require replacement; independent mechanic diagnosed and repaired in one case. Fuel tank strap replacement needed. One case quotes 90-day part availability. Dealer identified need for fuel system replacement due to metal in system but parts unavailable.
Recalls/TSBs owners mention: Recall 22V406000 applies to some fuel line cases. One case involved post-recall repair complications; dealer stated air intrusion into fuel lines occurred during recall repair. Parts availability cited as barrier to repair.
Fuel gauge and fuel sensor failure
Fuel gauge reads empty when tank is full or reads empty quickly after partial fuel use. Fuel level sensor failure indicated. One case involved fuel tank strap and fuel pump needing replacement.
When: Approximately 56,000 to 102,841 miles
Symptoms owners cite: Fuel gauge reads empty despite full tank; Fuel gauge reads empty after using quarter tank of fuel; Check engine light illuminated; Low fuel warning light illuminated; Service engine warning light illuminated
Repairs/costs cited: Fuel pump assembly quoted at $600+ by dealer; owner found same part under $300 elsewhere. One case required fuel tank strap and fuel pump replacement. One case diagnosed fuel tank strap and fuel pump need but VIN not in recall.
Recalls/TSBs owners mention: No recalls identified for fuel gauge/sensor issues in narratives. Manufacturer charged owners for repair; no recall support mentioned.
Post-recall repair complications and air intrusion into fuel lines
After dealer performs recall repair (22V406000), air enters fuel lines causing stalling, fuel leaks, and strong fuel odor. Dealer attempted to remove air by cycling ignition but issue persisted. Fuel line from HPFP to injector rail leaked after repair.
When: Immediately after dealer recall repair completion; approximately 99,964 miles
Symptoms owners cite: Vehicle stalls after recall repair completed; Failure to restart after stall; Abnormally strong fuel odor; Fuel line leaking (HPFP to driver-side injector rail); Undercarriage soaking wet with fuel; Fuel puddle on ground while idling
Repairs/costs cited: Dealer identified air intrusion as cause during recall repair. Dealer attempted fix by cycling ignition multiple times. Part ordered for leaking fuel line but repair status unclear. Independent inspection revealed leak and wet undercarriage.
Recalls/TSBs owners mention: Recall NHTSA Campaign Number 22V406000. Dealer performed initial repair but created secondary fuel line leak. Manufacturer notified but no assistance provided per owner.
Acceleration and power loss issues (post-EPA settlement update)
After EPA settlement update/class action completion, vehicle experiences intermittent power loss and delayed acceleration, particularly dangerous during turns across traffic. Described as 2–3 second acceleration delay. Owner refuses to drive truck and fears transporting child in it.
When: After EPA settlement update completion; timing not specified with mileage
Symptoms owners cite: Inconsistent power and acceleration; Intermittent acceleration issues; 2–3 second delay in acceleration response; No engine trouble codes present
Repairs/costs cited: Dealer and manufacturer refused diagnostics due to lack of engine trouble codes. No repairs attempted.
Recalls/TSBs owners mention: Manufacturer stated EPA is requiring the update and nothing can be done. Referred owner to settlement department. Settlement department unreachable per owner.
Check engine light and emission system faults without clear resolution
Check engine light illuminates with various fault messages (motive power reduced, electronic throttle control, emission system fault). Diagnostics point to fuel system or emission component but parts unavailable for recall repair or no issue found on dealer inspection.
When: Approximately 83,000 to 150,000 miles
Symptoms owners cite: Check engine light illuminated; Message 'motive power reduced' displayed; Message 'service electronic throttle control' displayed; Reduced power or inability to accelerate as needed; Rough running after restart; Intermittent failures
Repairs/costs cited: Independent mechanic diagnosed emission system issue; dealer diagnostics found no issues. Vehicle not repaired. One case: owner used code reader, result undisclosed but indicated fuel pressure pump faulty. Another: owner able to restart after one instance; check engine light concern only.
Recalls/TSBs owners mention: Recall 22V406000 applies. Parts unavailable cited. Some cases: manufacturer not notified. Manufacturer exceeded reasonable time for recall repair per owners.
Transmission seized in park and related drivability faults
One case: vehicle lost motive power, transmission seized in park, failed to restart. Dealer diagnosed need for high-pressure fuel pump replacement but parts unavailable.
When: Approximately 112,000 miles
Symptoms owners cite: Loss of motive power while driving; Unknown message displayed; Transmission seized in park position; Failure to restart
Repairs/costs cited: Dealer diagnosed high-pressure fuel pump replacement needed; parts unavailable under recall.
Recalls/TSBs owners mention: Recall NHTSA Campaign Number 22V406000. Manufacturer notified and case opened; parts unavailable.
Synthesized from 72 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.