{"vehicle":{"id":"2021_jeep_gladiator","year":2021,"make":"Jeep","model":"Gladiator"},"code":"P0300","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":14,"bulletins":[{"nhtsa_id":11030229,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-25","date":"2026-03-21","document_id":"18-044-26","mfr_campaign":null,"component":"ENGINE","summary":"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) ● P0071-00 - Ambient Air Temperature Sensor Performance. (In Active or Stored status) ● P0072-00 - Ambient Air Temperature Sensor Circuit \"A\" Low. (In Active or Stored status) ● P0073-00 - Ambient Air Temperature Sensor Circuit \"A\" High. (In Active or Stored status) ● P0011-00 - Bank 1 Camshaft 1 Position Timing Over Advanced Or. (In Active or Stored status) ● P25E4-00 - B Camshaft Position - Unable To Achieve Locked Position Bank 1. (In Active or Stored status) ● P05BD-00 - Stop-Start Mode Switch Range/Performance. (In Active or Stored status) ● P0116-00 - Engine Coolant Temperature Sensor 1 Performance. (In Active or Stored status) ● P062B-00 - Internal Control Module Fuel Injector Control Performance. (In Active or Stored status) ● P0604-00 - Internal Control Module Random Access Memory Ram Error. (In Active or Stored status) ● P060C-00 - Internal Control Module Main Processor Performance. (In Active or Stored status)** ● P018B-00 - Fuel Pressure Sensor \"B\" Circuit Range/performance. **(In Active or Stored status)** ● P1CEA-00 - Boost Side EVAP Purge System Performance. **(In Active or Stored status)** ● P06DD-00 - Engine Oil Pressure Control Circuit Performance/Stuck Off. **(In Active or Stored status)** ● P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking. **(In Active or Stored status)** ● P0300-00 - Multiple Cylinder Misfire. **(In Active or Stored status)** Customers may also experience one or more of the following: ● **Oil Level High Warning in the Instrument Panel Cluster (IPC).** ● Fully Autonomous Parking Assist (FAPA) is not deactivated when accelerator pedal is pressed. ● Vehicle is not heating up fast enough at freezi","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030229-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030229-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030229"},{"nhtsa_id":11029674,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-05","date":"2026-02-17","document_id":"18-006-26 REV.A","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; ENGINE","summary":"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P08A6 - Gear Lever Position Sensor System – Multiple Sensor Correlation (Manual Transmission Only). ● P152F - Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P0300 - Multiple Cylinder Misfire. ● P152E - Engine Hood Switch 2 Circuit High. ● P0032 - O2 Sensor 1/1 Heater Circuit High. ● P0038 - O2 Sensor 1/2 Heater Circuit High. ● P0052 - O2 Sensor 2/1 Heater Circuit High. ● P0058 - O2 Sensor 2/2 Heater Circuit High. ● P0132 - O2 Sensor 1/1 Circuit High. ● P0138 - O2 Sensor 1/2 Circuit High. ● P0152 - O2 Sensor 2/1 Circuit High. ● P0158 - O2 Sensor 2/2 Circuit High. ● P2100 - Electronic Throttle Control Motor Circuit Customers may also comment on one or more of the following: ● \"Service Transmission” message on in the Instrument Panel Cluster (IPC) due to clutch slip detection (Manual Transmission Only). NOTE: Customers might experience wheel spin or slippage and the PCM could interpreted the wheel spin or slippage as slipping the clutch too much and to avoid clutch damage, the customer may see the message in the IPC. ● Vehicle is in limp home mode. ● Spark knock/detonation sound from the engine at idle. Other software enhancements included: ● Engine oil pump in high pressure mode with cold engine oil to improve valvetrain component reliability. This bulletin involves reprogramming the PCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029674-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029674-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029674"},{"nhtsa_id":11028233,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-04","date":"2026-01-29","document_id":"18-006-26","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P08A6 – Gear Lever Position Sensor System – Multiple Sensor Correlation (Manual Transmission Only). ● P152F – Engine Hood Switch 2 / Engine Hood Switch 1 Correlation.** ● P0300 - Multiple Cylinder Misfire. ● P152E - Engine Hood Switch 2 Circuit High. ● P0032 - O2 Sensor 1/1 Heater Circuit High. ● P0038 - O2 Sensor 1/2 Heater Circuit High ● P0052 - O2 Sensor 2/1 Heater Circuit High ● P0058 - O2 Sensor 2/2 Heater Circuit High. ● P0132 - O2 Sensor 1/1 Circuit High. ● P0138 - O2 Sensor 1/2 Circuit High. ● P0152 - O2 Sensor 2/1 Circuit High. ● P0158 - O2 Sensor 2/2 Circuit High ● P2100 - Electronic Throttle Control Motor Circuit Customers may also comment on one or more of the following: ● **\"Service Transmission” message on in the Instrument Panel Cluster (IPC) due to clutch slip detection (Manual Transmission Only). NOTE: Customers might experience wheel spin or slippage and the PCM could interpreted the wheel spin or slippage as slipping the clutch too much and to avoid clutch damage, the customer may see the message in the IPC. ● Vehicle is in limp home mode.** ● Spark knock/detonation sound from the engine at idle. **Other software enhancements included: ● Engine oil pump in high pressure mode with cold engine oil to improve valvetrain component reliability.** This bulletin involves reprogramming the PCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028233-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028233-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028233"},{"nhtsa_id":11004840,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-07-17","date":"2024-07-10","document_id":"18-060-24","mfr_campaign":null,"component":"POWER TRAIN","summary":"\"Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2463 - Particulate Filter Restriction - Soot Accumulation Bank 1. (EE Market Only)** ● P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. ● P025C - Fuel Pump Module Control Circuit Low. ● P0300-00 - Multiple Cylinder Misfire. ● P0301-00 - Cylinder 1 Misfire. ● P0302-00 - Cylinder 2 Misfire. ● P0303-00 - Cylinder 3 Misfire. ● P0304-00 - Cylinder 4 Misfire. ● P0305-00 - Cylinder 5 Misfire. ● P0403-00 - EGR Control Circuit Open (Disabled Fault). ● P208B - Reductant Pump 1 Control Performance. ● P04DB - Crankcase Ventilation System Disconnected. ● P040F - EGR Temperature Sensor A-B Correlation. ● P225D - Nox Sensor 1/1 Performance - Signal Stuck Low. ● P0088 - Fuel Rail Pressure Too High. ● P0404 - EGR “A” Control Circuit Range/Performance. ● P20C6 - Reductant Heater 4 Control Circuit Performance. ● P0524 - Low oil pressure (during start up in cold ambient temps). ● P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. ● P02E8-00 - Diesel Intake Air Flow Position Sensor Circuit Low. ● P20FB-00 - Reductant Pump 2 Control Performance. ● P065A-00 - Generator System Performance. Customers may experience one or more of the following: ● Slow acceleration. ● Reduced vehicle speed & torque in high and 4 low. ● Poor cold idle stability. ● Poor idle quality with AC on. ● Excessive engine speed oscillations at tachometer red-line. ● Following a long key-on situation, poor cold start and idle stability. ● Cold hard start/extended crank. ● Block heater not providing a proper cold start and stable idle. ● High idle speeds at altitude when remote start is active. ● The cruise control and speed limited set speed doesn’t match the speedometer. It could be up to 2.5 kph (1.5 mph) difference. Other Software enhancements: ● Low speed engine idle improvements. ● Improved engine restart performance and torque response during low fuel level and/or hot ambient conditions. ● Corrects instances of vehicles restarting once SRC Inducement is active, and the mileage countdown has expired. ● Reduce engine delay during cold start garage shifts. ● Improve idle stability, Improvement of cold start and combustion stability after start during cold ambient temperatures. ● Eliminate turbocharger surge on tip-out. ● Eliminate idle oscillation in park and drive. ● Speedometer accuracy improvement(s). ● Cruise control updates. ● Battery durability improvements in hot ambient temperatures. This bulletin involves reprogramming the PCM with the latest available software.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11004840-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11004840-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11004840"},{"nhtsa_id":10229785,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-17","date":"2022-12-01","document_id":"18-042-22 REV. D","mfr_campaign":null,"component":"VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM; BACK OVER PREVENTION; EXTERIOR LIGHTING; ENGINE AND ENGINE COOLING","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon furtherinvestigation the technician may find one or more of the following DTCs: P0300 - Multiple Cylinder Misfire. P152E - Engine Hood Switch 2 Circuit High. P152F - Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. P0032 - O2 Sensor 1/1 Heater Circuit High. P0038 - O2 Sensor 1/2 Heater Circuit High. P0052 - O2 Sensor 2/1 Heater Circuit High. P0058 - O2 Sensor 2/2 Heater Circuit High. P0132 - O2 Sensor 1/1 Circuit High. P0138 - O2 Sensor 1/2 Circuit High. P0152 - O2 Sensor 2/1 Circuit High. P0158 - O2 Sensor 2/2 Circuit High. P2100 - Electronic Throttle Control Motor Circuit. In addition, customers may experience the following concern:Spark knock/detonation sound from the engine at idle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229785-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229785-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229785"},{"nhtsa_id":10229782,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-17","date":"2022-12-01","document_id":"18-002-22 REV. A","mfr_campaign":null,"component":"SUSPENSION; BACK OVER PREVENTION; FUEL SYSTEM, DIESEL; EXTERIOR LIGHTING; FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following DTCs have been set: P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. P025C - Fuel Pump Module Control Circuit Low. P0300-00 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0403-00 - EGR Control Circuit Open (Disabled Fault). P208B - Reductant Pump 1 Control Performance. P04DB - Crankcase Ventilation System Disconnected. P040F - EGR Temperature Sensor A-B Correlation. P225D - Nox Sensor 1/1 Performance - Signal Stuck Low. P0088 - Fuel Rail Pressure Too High. P0404 - EGR ?A? Control Circuit Range/Performance. P20C6 - Reductant Heater 4 Control Circuit Performance. P0524 - Low oil pressure (during start up in cold ambient temps). P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P02E8-00 - Diesel Intake Air Flow Position Sensor Circuit Low. P20FB-00 - Reductant Pump 2 Control Performance. P065A-00 - Generator System Performance. Customers may experience one or more of the following: Slow acceleration. Reduced vehicle speed&torque in high and 4 low. Poor cold idle stability. Poor idle quality with AC on. Excessive engine speed oscillations at tachometer red-line. Following a long key-on situation, poor cold start and idle stability. Cold hard start/extended crank. Block heater not providing a proper cold start and stable idle. High idle speeds at altitude when remote start is active. The cruise control and speed limited set speed doesn?t match the speedometer. It could be up to 2.5 kph (1.5 mph) difference. Other Software enhancements:Low speed engine idle improvements. Improved engine restart performance","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229782-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229782-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229782"},{"nhtsa_id":10229156,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-09","date":"2022-03-19","document_id":"1804222","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC: P0300 - Multiple Cylinder Misfire. In addition, customers may experience the following concern: Spark knock/detonation sound from the engine at idle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229156-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229156-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229156"},{"nhtsa_id":10227750,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-12-12","date":"2022-10-19","document_id":"1804222REVC","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC: P152E - Engine Hood Switch 2 Circuit High. P152F - Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. P0032 - O2 Sensor 1/1 Heater Circuit High. P0038 - O2 Sensor 1/2 Heater Circuit High. P0052 - O2 Sensor 2/1 Heater Circuit High. P0058 - O2 Sensor 2/2 Heater Circuit High. P0132 - O2 Sensor 1/1 Circuit High. P0138 - O2 Sensor 1/2 Circuit High. P0152 - O2 Sensor 2/1 Circuit High. P0158 - O2 Sensor 2/2 Circuit High. P2100 - Electronic Throttle Control Motor Circuit. P0300 - Multiple Cylinder Misfire. In addition, customers may experience the following concern: Spark knock/detonation sound from the engine at idle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10227750-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10227750-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10227750"},{"nhtsa_id":10223194,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-17","date":"2022-03-19","document_id":"1804222","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC: P0300 - Multiple Cylinder Misfire. In addition, customers may experience the following concern: Spark knock/detonation sound from the engine at idle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10223194-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10223194-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10223194"},{"nhtsa_id":10221467,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2022-06-01","document_id":"1804222REVB","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; EXTERIOR LIGHTING; ELECTRICAL SYSTEM","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC: P2100 - Electronic Throttle Control Motor Circuit. P0300 - Multiple Cylinder Misfire. In addition, customers may experience the following concern:Spark knock/detonation sound from the engine at idle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10221467-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10221467-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221467"}],"url":"https://open.wenmarpro.com/makes/jeep/gladiator/2021/bulletins?code=P0300"},"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/jeep/gladiator/2021/codes/P0300","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."]}