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Fuel systemPart report

2020 Ram 3500 Fuel system Problems

Complaints
57about this part
Share
49%of 116 total for the year
Median mileage
22,000miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 57 complaints about the fuel system of the 2020 Ram 3500, 49% of the 116 complaints for this model year. Where a mileage was given, the median is 22,000 miles. 1 of these say a crash was involved and 1 a fire, according to the filers. 1 recall campaign on record is filed under a similar system.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I bought my truck just over a month ago and was told I had to add lubricant to my fuel in order to keep my fuel pump from blowing up, as well as only put in 'good diesel.' I know diesel can change from one gas station to another, but to add a lubricant in order to keep my fuel pump from blowing up on and brand new $80000 truck! All because of the cp4 that Ram decided to use for two years, then went back to the cp3 in 2021. …”

NHTSA complaint #11390819, filed 2021-01, 2,600 miles

“I was driving on interstate 270 nb when all of sudden the vehicle started shaking and lost power. I had to stop in the middle of the interstate and was towed to the exit by the highway response team. Towed the vehicle to the dealership and was told the the fuel system has to be replaced.”

NHTSA complaint #11374797, filed 2020-11, 29,986 miles

“I purchased a knew 20 Ram 3500 and all though I haven't had the issue happen to me yet, I'm a nervous wreck that it will and my family and I will be stranded. There are hundreds if not thousands of people having experienced a catastrophic failure of the fairly new cp4 fuel pump. When this goes, it takes out the whole fuel system resulting in $17,000 worth of damage. What's worse is that your stranded ,with out a vehicle. Dealerships are only doing a limited amount of loaners but not a vehicle equal to what you had. …”

NHTSA complaint #11361596, filed 2020-09, 7,000 miles

“My 2020 Ram 3500 cummins 6.7 lost the injector pump (cp4.2) and I'm told it's about 15k to fix and will take 2 months to fix due to back ordered parts.”

NHTSA complaint #11397622, filed 2021-02, 61,589 miles

“I was towing my 5th wheel trailer from rancho cucamonga to san diego. When I was driving on I-15, almost nearby exit 15. Suddenly there is a error on the screen , said 'exhaust brake system failed , ask me go to dealer'. Then I found there is no power anymore . I tried to press the pedal again , still no power. Then I rolled over to the side of the freeway. When the speed came down to about 15mph, the engine stopped. Then I pooled over , and tried to restart it . Nothing happened. I can hear it trying to start, but no start anymore. …”

NHTSA complaint #11372337, filed 2020-10, 5,700 miles

Related recalls

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
202512%
202437%
202316%
2022147%
202158%
20205749%
20195037%
201871%
201793%
201675%
201564%
20142211%
20132017%
2007117%

Other parts of the 2020 Ram 3500

Engine
27 complaints
Transmission and drivetrain
12 complaints
Electrical system
9 complaints
Brakes
8 complaints
Steering
7 complaints
Wheels
7 complaints
Other or unknown
6 complaints
Tires
5 complaints
Engine cooling
4 complaints
Body and structure
4 complaints
Vehicle speed control
3 complaints
Air bags
2 complaints

← All problems reported for the 2020 Ram 3500

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology