Fault Code Lookup › Powertrain codes › P242F
P242F Powertrain · generic range, no listed definition
P242F fault code: what 3 Ram owners reported
P242F sits in the generic powertrain range (engine, transmission, fuel and emissions), but its SAE definition is not in CarHooq's list, so this page shows only what owners reported. What it meant in practice is below, from 3 complaints owners filed with NHTSA. Updated November 9, 2026.
- 3owner reports
- 2car models
- 0mention a crash
- 0mention a fire
- 2017–2020model years
Which cars get code P242F?
Every model whose owners mentioned P242F in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Where does P242F show up?
By brand
- Ram3
Component the owner filed it under
Is there a recall for P242F?
The others concern the component owners file this code under (Fuel/Propulsion System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Fuel System, Diesel: Delivery: Fuel Pump Chrysler (FCA US, LLC) is recalling certain 2019-2020 Ram 2500, 3500 pickup trucks, and Ram 3500, 4500, and 5500 cab chassis vehicles equipped with Cummins 6.7L Turbo Diesel engines. The High Pressure Fuel Pump (HPFP) may fail, resulting in a sudden engine stall without warning.
2020 Ram 3500, 2019 Ram 2500. Full risk and remedy on each car's report.
Fuel System, Diesel Chrysler (FCA US LLC) is recalling certain 2019 Ram 2500 and 3500 trucks, and 3500, 4500, and 5500 Cab Chassis vehicles equipped with diesel engines. The fuel lines may leak fuel into the engine compartment.
2019 Ram 2500. Full risk and remedy on each car's report.
What happened when owners saw P242F?
3 of the 3 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
While test driving a 2017 RAM 3500 6.7L Cummins diesel at Cherry Hill Dodge Chrysler Jeep Ram in Cherry Hill, New Jersey, both the check engine light and the regen warning light came on simultaneously. I returned to the dealership, looked up the regen warning, then retrieved my BlueDriver OBD2 scanner from my own vehicle. I scanned the truck on-site and ran live data. The scan confirmed the diesel particulate filter (DPF) was 100% full, and the regeneration system was not functioning. Permanent fault code P242F was stored, and the exhaust backpressure reading was over 25 PSI at idle — indicating a severely blocked system. These faults were not disclosed by the dealership, and no inspection…
The truck was initially brought in on April 10, 2024, for a continuous regeneration issue with the DPF filter, showing codes P242F and P1451. The dealership diagnosed it as requiring a new EGR valve and possibly a DPF filter assembly, under the VB6 emissions recall and extended warranty (XQ1). After replacing the EGR valve, the Y-78 HPFP safety recall was completed. Upon completion, the technician noted multiple fuel-related DTCs, lack of power, and metal debris at the fuel control actuator caused by a failed CP4 pump. At this time, the dealership was unaware of the XQ1 warranty, so instead of replacing the DPF filter, they force regenerated it. Upon picking up the truck, the check engine…
Codes: P2002, P242F, P2463, P1451 Failures: DPF, Charge air cooler leak, PM sensors, EGR internally cracked, Catalytic Convertor, Pink tinged oil, strong diesel odor in oil - post failures. Erratic def gauge readings, unstable idling, clunking downshift when exhaust brake decelerates, warm up stumbling. Power reduced, see dealer (over and over and over and over). Limp Mode (5 MPH). Permanent ticks/taps from front left motor, front passenger wheel well, passenger side mid-truck. Extremely loose gear shifter plus an occasional “Vehicle Not in Part” message on the dash display. Manufacturers Service Center (local and ONLY Ram dealership) has reproduced the issue. Independent Diesel Mechanic…
P242F: questions drivers ask
What does code P242F mean?
P242F sits in the generic powertrain range (engine, transmission, fuel and emissions), but its SAE definition is not in CarHooq's list, so CarHooq shows only what owners reported. 3 owners reported it to NHTSA, most often for the Ram 3500 (2), Ram 2500 (1); their reports describe what happened.
Which cars get code P242F most often?
In NHTSA owner complaints, P242F is mentioned most for the Ram 3500 (2), Ram 2500 (1), across 2 models and model years 2017 to 2020. Popular models collect more reports because more of them are on the road.
Is there a recall for code P242F?
No NHTSA recall text names P242F directly. 2 recalls on the cars that report this code concern the same component owners name most (Fuel/Propulsion System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P242F?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P242F. The code is in a generic range but its standard definition is not in CarHooq's list, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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