{"vehicle":{"id":"2021_ram_3500","year":2021,"make":"Ram","model":"3500"},"code":"P203E","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":8,"bulletins":[{"nhtsa_id":11008746,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-10-08","date":"2024-10-01","document_id":"25-006-24","mfr_campaign":null,"component":"UNKNOWN OR OTHER; ENGINE","summary":"\"Diesel Exhaust Fluid (DEF) Fluid Freezing Warranty Extension XR1 Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P203E-00 - Reductant Level Sensor 1 Circuit Intermittent-Erratic. Customers may also experience one or more of the following: ● Repeated freeze/thaw cycles of the urea tank to cause solid DEF crystals to form and settle on the focus tube, blocking the level sensor signal. ● Rapid temperature swings from below freezing to above freezing causing an incomplete thaw of the DEF tank. When the vehicle is powered on, the diagnostic is enabled due to thawed DEF at the tank bottom surface, but the fluid in the center is still partially frozen. ● Not following the proper DEF fill procedure and overfilling the tank. This bulletin involves replacing the urea delivery module and possibly updating the Dosing Control Unit (DCU) software\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008746-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008746-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11008746"},{"nhtsa_id":11008745,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-10-08","date":"2024-10-01","document_id":"25-007-24","mfr_campaign":null,"component":"UNKNOWN OR OTHER; ENGINE","summary":"\"Diesel Exhaust Fluid (DEF) Fluid Freezing Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P203E-00 - Reductant Level Sensor 1 Circuit Intermittent-Erratic. Customers may also experience one or more of the following: ● Repeated freeze/thaw cycles of the urea tank to cause solid DEF crystals to form and settle on the focus tube, blocking the level sensor signal. ● Rapid temperature swings from below freezing to above freezing causing an incomplete thaw of the DEF tank. When the vehicle is powered on, the diagnostic is enabled due to thawed DEF at the tank bottom surface, but the fluid in the center is still partially frozen. ● Not following the proper DEF fill procedure and overfilling the tank This bulletin involves replacing the urea delivery module and grade vent valve and updating the Dosing Control Unit (DCU) software This bulletin involves replacing the urea delivery module and possibly updating the Dosing Control Unit (DCU) software\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008745-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008745-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11008745"},{"nhtsa_id":11008196,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-10-01","date":"2024-09-24","document_id":"14-008-24","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"\"Diesel Exhaust Fluid (DEF) Fluid Freezing Warranty Extension XR1 Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P203E-00 - Reductant Level Sensor 1 Circuit Intermittent-Erratic. Customers may also experience one or more of the following: ● Repeated freeze/thaw cycles of the urea tank to cause solid DEF crystals to form and settle on the focus tube, blocking the level sensor signal. ● Rapid temperature swings from below freezing to above freezing causing an incomplete thaw of the DEF tank. When the vehicle is powered on, the diagnostic is enabled due to thawed DEF at the tank bottom surface, but the fluid in the center is still partially frozen. ● Not following the proper DEF fill procedure and overfilling the tank. This bulletin involves replacing the urea delivery module and possibly updating the Dosing Control Unit (DCU) software.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008196-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008196-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11008196"},{"nhtsa_id":11002802,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-07-02","date":"2024-06-28","document_id":"14-005-24","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"\"Diesel Exhaust Fluid (DEF) Fluid Freezing **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC):** ● P203E-00 - Reductant Level Sensor 1 Circuit Intermittent-Erratic. Customers may also experience one or more of the following: ● Repeated freeze/thaw cycles of the urea tank to cause solid DEF crystals to form and settle on the focus tube, blocking the level sensor signal. ● Rapid temperature swings from below freezing to above freezing causing an incomplete thaw of the DEF tank. When the vehicle is powered on, the diagnostic is enabled due to thawed DEF at the tank bottom surface, but the fluid in the center is still partially frozen. ● Not following the proper DEF fill procedure and overfilling the tank.** This bulletin involves replacing the urea delivery module and grade vent valve and updating the Dosing Control Unit (DCU) software.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11002802-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11002802-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11002802"},{"nhtsa_id":10236935,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-05-30","date":"2023-04-15","document_id":"1400323","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"Diesel Exhaust Fluid (DEF) Fluid Freezing Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: ? P203E-00 - Reductant Level Sensor 1 Circuit Intermittent-Erratic. This bulletin involves replacing the urea delivery module and grade vent valve and updating the Dosing Control Unit (DCU) software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10236935-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10236935-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10236935"},{"nhtsa_id":10221186,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2021-04-02","document_id":"1803421","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL","summary":"P203E and P203F Additional Diagnostic Information This bulletin provides additional information regarding diagnosing Diesel Exhaust Fluid (DEF) issue in extreme cold weather. Diagnostic Trouble Codes (DTCs) P203E - Reductant Level Sensor 1 Circuit Intermittent and/or P203F - Reductant Level Too Low set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10221186-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10221186-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221186"},{"nhtsa_id":10204384,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-13","date":"2021-11-10","document_id":"18-034-21 REV. A","mfr_campaign":null,"component":"FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION; FUEL SYSTEM, DIESEL","summary":"P203E and P203F Additional Diagnostic Information This bulletin provides additional information regarding diagnosing Diesel Exhaust Fluid (DEF) issue in extreme cold weather. Diagnostic Trouble Codes (DTCs) P203E - Reductant Level Sensor 1 Circuit Intermittent and/or P203F - Reductant Level Too Low set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204384-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204384-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10204384"},{"nhtsa_id":10194039,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-24","date":"2021-04-02","document_id":"18-034-21","mfr_campaign":null,"component":"BACK OVER PREVENTION; FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE","summary":"P203E and P203F Additional Diagnostic Information This bulletin provides additional information regarding diagnosing Diesel Exhaust Fluid (DEF) issue in extreme cold weather. Diagnostic Trouble Codes (DTCs) P203E - Reductant Level Sensor 1 Circuit Intermittent and/or P203F - Reductant Level Too Low set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194039-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194039-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10194039"}],"url":"https://open.wenmarpro.com/makes/ram/3500/2021/bulletins?code=P203E"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/ram/3500/2021/codes/P203E","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}