Diagnostic trouble code · Jeep
P0300 on Jeep vehicles Misfire detected, but not isolated to one cylinder
P0300 is named on 35 Jeep model years (2016–2025): 122 manufacturer filings and 10 owner reports in NHTSA’s files, across Gladiator Pickup, Wrangler, Gladiator, Cherokee, Grand Cherokee and 4 more.
Powertrain 35 model years 122 manufacturer filings 10 owner reports
Which Jeep model years name P0300
Source: NHTSA manufacturer communications and complaintsA model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Engine 50 Electrical System 25 Power Train 21 Equipment 13
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Jeep filings that name P0300
Source: NHTSA manufacturer communicationsBulletins and campaigns Jeep filed with NHTSA whose summary names P0300. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 18-053-20 Service bulletin2020-07-11 · Electrical System — Software
- 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 one or more ofthe following DTCs. P0300 - Multiple Cylinder Misfire. P258B - Electronic Vacuum Pump Performance. C1252-92 - Vacuum Pump Control C
- 18-053-20 REV. A Service bulletin2020-08-28 · Fuel System, Gasoline
- 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 one or more of the following DTCs. P0300 - Multiple Cylinder Misfire. P258B - Electronic Vacuum Pump Performance. C1252-92 - Vacuum Pump Control
- 18-053-20 REV. B Service bulletin2020-09-30 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- 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 one or more ofthe following Diagnostic Trouble Codes (DTCs).P0300 - Multiple Cylinder Misfire. P258B - Electronic Vacuum Pump Performance. C1252-
- 1804122 REVA Service bulletin2022-03-19 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- 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 f
- S1918000008 Service bulletin2021-06-19 · Back Over Prevention
- Customer?s complaint may include a MIL-on with one or more of the following DTCs Active, Pending, or Stored in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 Bank 1 downstream O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routines f
- S1918000008 Service bulletin2021-08-12 · Engine And Engine Cooling
- Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routin
- 1804222 REVA Service bulletin2022-03-19 · Power Train
- 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 f
- S1918000008RevC Service bulletin2021-08-12 · Back Over Prevention
- Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routin
- S1918000008 Rev. Service bulletin2021-01-16 · Engine And Engine Cooling
- Customer's complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routin
- S1918000008 Rev. Service bulletin2021-01-16 · Equipment
- Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routin
- 08-027-20 Service bulletin2020-03-04 · Electrical System
- 2.4L Ignition Coil Boot Replacement This bulletin involves replacing all four ignition coil insulating boots. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find thatone or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0300 - Multiple Cylinder Misfire P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Mis
- 08-027-20 Service bulletin2020-03-04 · Equipment
- 2.4L Ignition Coil Boot Replacement This bulletin involves replacing all four ignition coil insulating boots. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find thatone or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0300 - Multiple Cylinder Misfire P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Mis
What P0300 means
Source: SAE J2012 / OBD-IIMisfire detected, but not isolated to one cylinder.
A stored code names the test that failed, never the part that caused it. The record above is what Jeep and its owners have filed about it; the code’s page across every make has the whole file.
From here
Common questions
Source: NHTSA files and the OBD-II standardIs P0300 a known problem on Jeep vehicles?
It is a documented one: NHTSA's files hold 122 manufacturer filings and 10 owner reports naming P0300 on 35 Jeep model years (2016–2025). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Jeep models does P0300 appear on most?
2020 Gladiator Pickup (20 documents), 2021 Wrangler (10 documents), 2021 Gladiator (8 documents).
Does P0300 on a Jeep mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.