JEEP
09-013-26
Manufacturer communications
- Publication date
- 2026-07-10
- Received by NHTSA
- 2026-07-18
- NHTSA record numbers
- 11035049
Manufacturer summary
Original wording in English
Engine Runs Rough 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 - Random/Multiple Cylinder Misfire Detected.
• P0301-00 - Cylinder 1 Misfire.
• P0302-00 - Cylinder 2 Misfire.
• P0303-00 - Cylinder 3 Misfire.
• P0304-00 - Cylinder 4 Misfire. Customers may also comment on the following:
• Engine runs rough. This bulletin involves replacing all four main chamber spark plugs.
• P0300-00 - Random/Multiple Cylinder Misfire Detected.
• P0301-00 - Cylinder 1 Misfire.
• P0302-00 - Cylinder 2 Misfire.
• P0303-00 - Cylinder 3 Misfire.
• P0304-00 - Cylinder 4 Misfire. Customers may also comment on the following:
• Engine runs rough. This bulletin involves replacing all four main chamber spark plugs.
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Jeep
P0300-00Random/Multiple Cylinder Misfire DetectedJeep
P0301-00Cylinder 1 MisfireJeep
P0302-00Cylinder 2 MisfireJeep
P0303-00Cylinder 3 MisfireJeep
P0304-00Cylinder 4 MisfireCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Jeep | GRAND CHEROKEE | 2026 |
| Jeep | GRAND CHEROKEE L | 2026 |