HomeP0303 · Manufacturer communications

P0303 · Manufacturer communications

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

P0303 →

JEEP

Reported code forms P0303-00

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 -…

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09-023-26

JEEP

Reported code forms P0303-00

Umbrella Valve Seal Missing From Cylinder Head Cover Vehicle may exhibit a MIL-ON. SYMPTOM: Upon inspection the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have set: ● P0300-00…

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09-020-26

JEEP

Reported code forms P0303-00

Umbrella Valve Seal Missing From Cylinder Vehicle may exhibit a MIL-ON. SYMPTOM: Upon inspection the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have set: ● P0300-00 -…

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JEEP

Reported code forms P0303-00

Umbrella Valve Seal Missing From Cylinder Head Cover Customer may experience a MIL-ON and/or an indication of low engine oil level. SYMPTOM: Upon inspection the technician may find the following: 1. One or more of the…

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09-017-26

JEEP

Reported code forms P0303-00

Umbrella Valve Seal Missing From Cylinder Head Cover Customer may experience a MIL-ON and/or an indication of low engine oil level. SYMPTOM: Upon inspection the technician may find the following: 1. One or more of the…

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09-013-26

JEEP

Reported code forms P0303-00

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 -…

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18-058-26

JEEP

Reported code forms P0303-00

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one of the following Diagnostic Trouble Codes (DTCs): ● P1CEA -…

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18-051-26

JEEP

Reported code forms P0303

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…

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18-050-26

JEEP

Reported code forms P0303

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…

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18-049-26

JEEP

Reported code forms P0303

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…

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09-011-25

CHRYSLER, DODGE, JEEP, RAM

Reported code forms P0303

"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…

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1400322REVA

DODGE, JEEP

Reported code forms P0303

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)…

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CHRYSLER, DODGE, JEEP, RAM

Reported code forms P0303

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…

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09-013-20

CHRYSLER, DODGE, JEEP, RAM

Reported code forms P0303

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…

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1809419

JEEP

Reported code forms P0303

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…

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18-094-19

JEEP

Reported code forms P0303

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…

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DODGE, JEEP

Reported code forms P0303

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the PCM with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL)…

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1805516

DODGE, JEEP

Reported code forms P0303

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction…

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18-055-16

DODGE, JEEP

Reported code forms P0303

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction…

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18-070-15

DODGE, JEEP

Reported code forms P0303

Flash: PCM Software Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL)…

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1802404

CHRYSLER, DODGE, JEEP

Reported code forms P0303

IDLE FLUCTUATION AND OR MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATION DIAGNOSTIC TROUBLE CODES P0300, P0301, P0302, P0303 OR P0304. *TT

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