{"vehicle":{"id":"2021_dodge_durango","year":2021,"make":"Dodge","model":"Durango"},"code":"P0303","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":5,"bulletins":[{"nhtsa_id":11029758,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-05","date":"2026-02-27","document_id":"18-033-26","mfr_campaign":null,"component":"ENGINE; POWER TRAIN","summary":"Flash: Powertrain Control Module (PCM) Updates **Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0300-00 - Multiple Cylinder Misfire - in Active or Stored status set during cold start catalyst heating. ● P0301-00 - Cylinder 1 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0302-00 - Cylinder 2 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0303-00 - Cylinder 3 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0304-00 - Cylinder 4 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0305-00 - Cylinder 5 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0306-00 - Cylinder 6 Misfire - in Active or Stored status set during cold start catalyst heating.** ● P2097 - Downstream Fuel Trim System 1 Rich. ● P2099 - Downstream Fuel Trim System 2 Rich. **Customers may comment on one or more of the following: ● Vehicle has a rough idle. ● Engine misfires. ● Noisy valvetrain.** This bulletin involves reprogramming the PCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029758-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029758-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029758"},{"nhtsa_id":11018482,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-05-20","date":"2025-05-18","document_id":"09-011-25","mfr_campaign":null,"component":"ENGINE","summary":"\"Misfire Diagnostic Trouble Codes (DTCs), Rough Idle, Valvetrain Noise Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0301 - Cylinder 1 Misfire. ● P0302 - Cylinder 2 Misfire. ● P0303 - Cylinder 3 Misfire. ● P0304 - Cylinder 4 Misfire. ● P0305 - Cylinder 5 Misfire. ● P0306 - Cylinder 6 Misfire. Customers may comment on one or more of the following: ● Rough idle. ● Valvetrain noise. \"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018482-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018482-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11018482"},{"nhtsa_id":10221475,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2022-06-04","document_id":"1400322REVA","mfr_campaign":null,"component":"EXTERIOR LIGHTING; FUEL SYSTEM, GASOLINE","summary":"6.4L Fuel Injector High Flow Misfire This bulletin involves inspecting the Julian date on the fuel rails, fuel injectorsand possibly replacing fuel injectors. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or moreof the following Diagnostic Trouble Codes (DTCs) have been set: P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. P0307 - Cylinder 7 Misfire. P0308 - Cylinder 8 Misfire. The customer may also describe: Rough idle or misfire while driving.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10221475-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10221475-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221475"},{"nhtsa_id":10187706,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-01","date":"2020-12-12","document_id":"09-013-20 REV. A","mfr_campaign":null,"component":"EQUIPMENT; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:IGNITION:COIL:SPARK PLUGS; ENGINE","summary":"3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. Customers may also comment on the following:Rough running engine.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10187706-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10187706-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10187706"},{"nhtsa_id":10187686,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-01","date":"2020-12-05","document_id":"09-013-20","mfr_campaign":null,"component":"ENGINE; EQUIPMENT; ELECTRICAL SYSTEM","summary":"3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. Customers may also comment on the following: Rough running engine.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10187686-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10187686-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10187686"}],"url":"https://open.wenmarpro.com/makes/dodge/durango/2021/bulletins?code=P0303"},"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/dodge/durango/2021/codes/P0303","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."]}