{"vehicle":{"id":"2018_jeep_wrangler","year":2018,"make":"Jeep","model":"Wrangler"},"code":"P04FC","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":8,"bulletins":[{"nhtsa_id":10229336,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-09","date":"2020-07-16","document_id":"1801820","mfr_campaign":null,"component":"BACK OVER PREVENTION; ELECTRICAL SYSTEM; EXTERIOR LIGHTING; FUEL SYSTEM, GASOLINE","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs: P04FC - Crankcase Ventilation System Performance. P0456 EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P061A - Level 2 Torque Performance. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition:Excessive fan noise when the A/C is on MAX output. Other enhancements included in this update: Electric vacuum pump (EVP) update. Fan noise reduction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10229336-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10229336-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229336"},{"nhtsa_id":10226046,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-11-07","date":"2022-09-30","document_id":"1814422","mfr_campaign":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs: P0335 - Crankshaft Position Sensor Circuit. P0339 - Crankshaft Position Sensor Intermittent. P2C90 - Crankcase Ventilation System - Hose \"A\" Disconnected. P04FC - Crankcase Ventilation System Performance. P0456 EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P061A - Level 2 Torque Performance. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition:Excessive fan noise when the A/C is on MAX output. Other enhancements included in this update: Electric vacuum pump (EVP) update. Fan noise reduction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10226046-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10226046-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10226046"},{"nhtsa_id":10223588,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-17","date":"2020-06-19","document_id":"1801420","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","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 that one or more of the following DTCs have been set:P2C90 - Crankcase Ventilation System - Hose \"A\" Disconnected(APAC, EMEA and LATAM Only). P04FC - Crankcase Ventilation System Performance(APAC, EMEA and LATAM Only). P2453 - Particulate Filter Pressure Sensor \"A\" Circuit Range/Performance(APAC and EMEA only equipped with Gas Particulate Filter (GPF). P245F - Particulate Filter Pressure Sensor \"B\" Circuit Range/Performance(APAC and EMEA only equipped with Gas Particulate Filter (GPF). P0456 - EVAP System Small Leak. If DTC P0456 is present use wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P0171 - Fuel System 1/1 Lean(LATAM Only). P0172 - Fuel System 1/1 Rich(LATAM Only). P0128 - Thermostat Rationality(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). P050B - Cold Start Ignition Timing Performance(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). Customers may comment on one or more of the following:Excessive fan noise when the A/C is on MAX output. Rough idle at engine start up in colder ambient temperatures. Software enhancements also included in this update:Electric Vacuum Pump (EVP) update. Fan noise reduction. Low Speed Pre Ignition (LSPI) update.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10223588-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10223588-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10223588"},{"nhtsa_id":10221766,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2020-07-16","document_id":"1801820","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs: P04FC - Crankcase Ventilation System Performance. P0456 EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P061A - Level 2 Torque Performance. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition:Excessive fan noise when the A/C is on MAX output. Other enhancements included in this update: Electric vacuum pump (EVP) update. Fan noise reduction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10221766-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10221766-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221766"},{"nhtsa_id":10194053,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-24","date":"2021-04-15","document_id":"18-036-21","mfr_campaign":null,"component":"FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION; ELECTRICAL SYSTEM; EXTERIOR LIGHTING; SERVICE BRAKES","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 that one or more of the following DTCs have been set:P02EE - Cylinder 1 Injector Circuit Performance(APAC, EMEA and LATAM Only). P02EF - Cylinder 2 Injector Circuit Performance(APAC, EMEA and LATAM Only). P02F0 - Cylinder 3 Injector Circuit Performance(APAC, EMEA and LATAM Only). P02F1 - Cylinder 4 Injector Circuit Performance(APAC, EMEA and LATAM Only). P2C90 - Crankcase Ventilation System - Hose \"A\" Disconnected(APAC, EMEA and LATAM Only). P04FC - Crankcase Ventilation System Performance(APAC, EMEA and LATAM Only). P2453 - Particulate Filter Pressure Sensor \"A\" Circuit Range/Performance(APAC and EMEA only equipped with Gas Particulate Filter(GPF)). P245F - Particulate Filter Pressure Sensor \"B\" Circuit Range/Performance(APAC and EMEA only equipped with Gas Particulate Filter (GPF)). P0456 - EVAP System Small Leak.If DTC P0456 is present use wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P0171 - Fuel System 1/1 Lean(LATAM Only). P0172 - Fuel System 1/1 Rich(LATAM Only). P0128 - Thermostat Rationality(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). P050B - Cold Start Ignition Timing Performance(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). Customers may comment on one or more of the following:Excessive fan noise when the A/C is on MAX output. Rough idle at engine start up in colder ambient temperatures. The following software enhancements are also included in this update:Electric Vacuum Pump (EVP) update. Fan noise reduction. Low Speed Pre Ignition (LSPI) update.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194053-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194053-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10194053"},{"nhtsa_id":10181540,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-10-26","date":"2020-09-02","document_id":"S2018000010","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"Malfunction Indicator Lamp (MIL) Illuminated, Diagnostic Trouble Code (DTC) P2C90 - Crankcase Ventilation System - Hose \"A\" Disconnected or P04FC -Crankcase Ventilation Performance","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10181540-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10181540-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10181540"},{"nhtsa_id":10178693,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-08-24","date":"2020-07-16","document_id":"18-018-20 REV. A","mfr_campaign":null,"component":"POWER TRAIN","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs: P04FC - Crankcase Ventilation System Performance. P0456 EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P061A - Level 2 Torque Performance. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition:Excessive fan noise when the A/C is on MAX output. Other enhancements included in this update: Electric vacuum pump (EVP) update. Fan noise reduction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10178693-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10178693-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10178693"},{"nhtsa_id":10177533,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-07-27","date":"2020-06-19","document_id":"18-014-20 REV. B","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","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 that one or more of the following DTCs have been set:P2C90 - Crankcase Ventilation System - Hose \"A\" Disconnected(APAC, EMEA and LATAM Only). P04FC - Crankcase Ventilation System Performance(APAC, EMEA and LATAM Only). P2453 - Particulate Filter Pressure Sensor \"A\" Circuit Range/Performance(APAC and EMEA only equipped with Gas Particulate Filter (GPF). P245F - Particulate Filter Pressure Sensor \"B\" Circuit Range/Performance(APAC and EMEA only equipped with Gas Particulate Filter (GPF). P0456 - EVAP System Small Leak. If DTC P0456 is present use wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P0171 - Fuel System 1/1 Lean(LATAM Only). P0172 - Fuel System 1/1 Rich(LATAM Only). P0128 - Thermostat Rationality(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). P050B - Cold Start Ignition Timing Performance(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). Customers may comment on one or more of the following:Excessive fan noise when the A/C is on MAX output. Rough idle at engine start up in colder ambient temperatures. Software enhancements also included in this update:Electric Vacuum Pump (EVP) update. Fan noise reduction. Low Speed Pre Ignition (LSPI) update.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177533-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177533-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10177533"}],"url":"https://open.wenmarpro.com/makes/jeep/wrangler/2018/bulletins?code=P04FC"},"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/wrangler/2018/codes/P04FC","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."]}