Flash: 2.4L powertrain diagnostic and system improvements. bulletin involves reprogramming the powertrain...

Bulletin number

18-023-16 REV.C

Component

Power train

Summary

Flash: 2.4l powertrain diagnostic and system improvements. 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) illumination or one or more of the following conditions. Upon further investigation the technician may find the following diagnostic trouble codes (dtcs) set in the PCM, memory:2015 uf vehicles with (sales codes ed6, ed8)· p050d - cold start rough idle. P0335 - crankshaft position sensor circuit. P1607 - PCM internal shutdown timer rationality. P0133 - o2 sensor 1/1 slow response. P0456 - evap system small leak.· p0480 - cooling fan 1 control circuit/open. U0402 - implausible data received from TCM. P2172 - high airflow/vacuum leak detected.p1d73 - ags performance. U0140 - lost communication with body control module. · p0441 - evap purge system performance. · p0116 - engine coolant temperature sensor 1 performance.in addition to the dtcs above the following improvements have been made:engine startup flare and idle surge.improved vehicle acceleration. 2015 pf vehicles with (sales codes ed6, ed8)u0401 - implausible data received from ECM/PCM - signal invalid. P1185 - general pressure sensor correlation.p050d - cold start rough idle. P0133 - o2 sensor 1/1 slow response. P0456 - evap system small leak.p219a - bank 1 air-fuel ratio imbalance. P2172 - high airflow/vacuum leak detected.p1d73 - ags performance.u0140 - lost communication with body control module. P0116 - engine coolant temperature sensor 1 performance. P050b - cold start ignition timing performance. P061a - level 2 torque performance.p2172 - high airflow/vacuum leak detected (instantaneous accumulation).in addition to the dtcs above the following improvements have been made: low idle speed after cold start between -10°c to 0°c (14°f to 32°f).

Owners of these vehicles have filed 1,468 complaints in the transmission category.