Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the...
Jeep technical service bulletin 1803621 for 2018 Jeep Wrangler.
- Bulletin number
- 1803621
- Component
- Exterior lighting
- 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 f 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.
Owners of these vehicles have filed 9 complaints in the lights category.
Vehicles covered
- Jeep Wrangler 2018 2018
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