# P0303 on the 2023 Jeep Compass

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.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0303

- [11030127](https://open.wenmarpro.com/bulletins/11030127), 2026-03-18: Not applicable to vehicles built for US market. Fuel Injector Leak 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 \(DTCs\): ● \*\*P1336\-00 \- Multiple Cylinder Misfire. ● P1337\-00 \- Cylinder 1 Misfire. ● P1338\-00 \- Cylinder 2 Misfire. ● P1339\-00 \- Cylinder 3 Misfire. ● P1340\-00 \- Cylinder 4 Misfire.\*\* ● 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. Customers may also comment on one or more of the following: ● Unstable idle. ● Abnormal engine noise. , Diagnostic section, Repair Procedure, additional Claims Data Note, Special Tool and Reading Defects and Cleaning Procedure Of
- [11026795](https://open.wenmarpro.com/bulletins/11026795), 2025-12-23: Not applicable to vehicles built for US market. Fuel Injector Leak Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0087\-00 \- Fuel Line Pressure Sensor \- Bank 1 \- Pressure Below Limit. ● 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. ● P006C\-00 \- Air Pressure and Temperature Sensor \- Correlation. Customers may also comment on one or more of the following: ● Unstable idle. ● Abnormal engine noise This bulletin involves diagnosing and possibly replacing the fuel injectors and the high pressure tube.
- [11026794](https://open.wenmarpro.com/bulletins/11026794), 2025-12-23: Not applicable to vehicles built for US market. Fuel Injector Leak Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0087\-00 \- Fuel Line Pressure Sensor \- Bank 1 \- Pressure Below Limit. ● 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. ● P006C\-00 \- Air Pressure and Temperature Sensor \- Correlation. Customers may also comment on one or more of the following: ● Unstable idle. ● Abnormal engine noise This bulletin involves diagnosing and possibly replacing the fuel injectors and the high pressure tube.
- [11025501](https://open.wenmarpro.com/bulletins/11025501), 2025-11-13: Not applicable to vehicles built for US market. Fuel Injector Leak Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0087\-00 \- Fuel Line Pressure Sensor \- Bank 1 \- Pressure Below Limit. ● 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. ● P006C\-00 \- Air Pressure and Temperature Sensor \- Correlation. Customers may also comment on one or more of the following: ● Unstable idle. ● Abnormal engine noise This bulletin involves diagnosing and possibly replacing the fuel injectors and the high pressure tube.
- [11023069](https://open.wenmarpro.com/bulletins/11023069), 2025-09-10: Not applicable to vehicles built for US market. Spark Plug Melting Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0300 \-00 \- Random/Multiple Cylinder \- Misfire Detected. ● P0301 \-00 \- Cylinder 1 \- Misfire Detected. ● P0302 \-00 \- Cylinder 2 \- Misfire Detected. ● P0303 \-00 \- Cylinder 3 \- Misfire Detected. ● P0304 \-00 \- Cylinder 4 \- Misfire Detected. ● P1336 \-00 \- Combustion misfiring \(impact on catalytic converter\) : Cylinder undetermined. ● P1337 \- Combustion misfiring \(impact on catalytic converter\) : Cylinder 1. ● P1338 \- Combustion misfiring \(impact on catalytic converter\) : Cylinder 2. ● P1339 \- Combustion misfiring \(impact on catalytic converter\) : Cylinder 3. ● P1340 \- Combustion misfiring \(impact on catalytic converter\) : Cylinder 4. Customers may also experience one or more of the following: ● Engine makes a loud metallic knocking noise at idle. ● Difficulty starting. ● Rough and noisy idle This bulletin involves inspecting for DTCs, inspecting for engine leaks and/or damage, and replacing the spark plugs.
- [11018223](https://open.wenmarpro.com/bulletins/11018223), 2025-05-09: Fuel Injector Leak Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0087\-00 \- Fuel Line Pressure Sensor \- Bank 1 \- Pressure Below Limit. ● P0300\-00 \- Multiple Cylinder Misfire. ● P0301 \- Cylinder 1 Misfire. ● P0302 \- Cylinder 2 Misfire. ● P0303 \- Cylinder 3 Misfire. ● P0304 \- Cylinder 4 Misfire. ● P006C\-00 \- Air Pressure and Temperature Sensor \- Correlation. Customers may also comment on one or more of the following: ● Unstable idle. ● Abnormal engine noise. This bulletin involves diagnosing and possibly replacing the fuel injectors and the high pressure tube.
- [11016877](https://open.wenmarpro.com/bulletins/11016877), 2025-04-08: "Fuel Injector Leak Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0087\-00 \- Fuel Line Pressure Sensor \- Bank 1 \- Pressure Below Limit. ● P0300\-00 \- Multiple Cylinder Misfire. ● P0301 \- Cylinder 1 Misfire. ● P0302 \- Cylinder 2 Misfire. ● P0303 \- Cylinder 3 Misfire. ● P0304 \- Cylinder 4 Misfire. ● P006C\-00 \- Air Pressure and Temperature Sensor \- Correlation. Customers may also comment on one or more of the following: ● Unstable idle. ● Abnormal engine noise. This bulletin involves diagnosing and possibly replacing the fuel injectors and the high pressure tube."