Owners of the 2018 Jeep Grand Cherokee diesel report multiple fuel system issues across the mileage spectrum. Early failures appear around 18,000 miles with complete stalling events — the engine lunges forward, the electronic throttle control light comes on, and the vehicle dies without restarting. Dealers have replaced high-pressure fuel pumps, throttle ignition coils, and fuel filters to address this, though one owner experienced repeat failures at two additional dealers that could not duplicate the problem.
Higher-mileage complaints (35,000–82,000 miles) involve fuel tank fill defects where the pump nozzle shuts off prematurely during refueling, making it impossible to fill the tank. A fuel system warning light accompanies this failure, and replacement fuel tanks have been diagnosed.
A significant portion of complaints stem from NHTSA Campaign 22V406000, which issued a diesel fuel system recall. Eight owners received official notification but report parts have been unavailable for months or longer, leaving their vehicles unrepaired while symptoms like shaking, hesitation, and near-stalling continue. Owners state Jeep exceeded a reasonable timeframe for the recall repair. One owner also reports an air-escape noise from the passenger side around 39,000 miles, diagnosed as requiring diesel particulate matter harness and exhaust manifold replacement.
Failure modes owners describe
High-pressure fuel pump failure
Engine stalls during driving with electronic throttle control indicator illuminated; vehicle unable to restart. Dealers diagnosed high-pressure fuel pump requiring replacement.
When: Approximately 18,000 miles
Symptoms owners cite: Vehicle lunged forward then stalled at various speeds; Electronic throttle control indicator illuminated; Unable to restart after stalling; Intermittent stalling while ascending hills; Vehicle hesitation on acceleration; Delayed throttle response
Repairs/costs cited: High-pressure fuel pump replacement at Danbury Chrysler Jeep Dodge Ram Fiat; also throttle ignition coil and fuel filter replacement were performed at first service location
Recalls/TSBs owners mention: Manufacturer notified but did not assist with repair
Fuel tank failure with fill-sensing defect
Fuel pump nozzle stops prematurely at gas station as if tank is full when it is not; fuel system warning light illuminated. Diagnosis indicated fuel tank failure requiring replacement.
When: Approximately 82,000 miles (complaint #5); also reported at unspecified mileage (complaint #13)
Symptoms owners cite: Pump nozzle stops prematurely during refueling; Tank cannot be filled to capacity; Fuel system warning light illuminated
Repairs/costs cited: Fuel tank replacement needed; repair not completed by owner
Recalls/TSBs owners mention: Manufacturer referred contact to NHTSA Hotline
NHTSA Campaign 22V406000 – Diesel fuel system parts unavailable for recall
Eight owners received recall notification for Campaign 22V406000 (Fuel System, Diesel) but parts were not available for repair. Multiple owners report shaking, near-stalling, and hesitation symptoms while waiting for recall parts. Manufacturer exceeded reasonable repair timeline.
When: Approximately 25,000–35,000 miles at time of complaint
Symptoms owners cite: Vehicle shaking at highway speeds; Near-stalling while ascending hills; Hesitation on acceleration; Abnormal humming noise detected; Vehicle unresponsive to accelerator pedal pressure
Codes mentioned: NHTSA Campaign 22V406000
Repairs/costs cited: No repair completed due to parts unavailability; VIN tool confirms parts not available
Recalls/TSBs owners mention: NHTSA Campaign Number 22V406000 recall issued; parts distribution problem persists with no alternative support offered
Diesel particulate matter system noise
Air-escape noise from passenger side of vehicle at highway speeds. Diagnosis indicated diesel particulate matter harness and exhaust manifold requiring replacement.
When: Approximately 39,000 miles
Symptoms owners cite: Noise resembling air escaping from passenger side; Noise observed while driving at 45 MPH
Repairs/costs cited: Diesel particulate matter harness and exhaust manifold replacement needed; repair not completed
Recalls/TSBs owners mention: Manufacturer notified of failure
Synthesized from 13 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.