2018 Chrysler 300 PCM and ECM Service Guide
In the 2018 Chrysler 300, the Powertrain Control Module (PCM) and Engine Control Module (ECM) manage engine timing, fuel delivery, and transmission shift logic. Failure of either unit may interrupt sensor data, trigger internal fault codes, and prevent the engine from starting or running smoothly.
Quick Summary
- PCM and ECM relearn procedures each require about half an hour of labor.
- Replacing a PCM typically involves a 0.9‑hour R&R task.
- Factory guidance insists the new PCM be programmed with the original VIN and mileage.
- Service Bulletin U60 addresses a required PCM reprogram for safety compliance.
When a 2018 Chrysler 300 exhibits erratic starting, stalling, or unexpected shift behavior, the powertrain and engine control computers are often the focus. Understanding how these modules function, what labor is involved in their removal and replacement, and the programming steps required can help you assess repair options. This guide outlines the key tasks, typical labor times, and precautions so you know what to expect before authorizing service.
What the PCM Does in a 2018 Chrysler 300
The Powertrain Control Module in the 2018 Chrysler 300 interprets sensor inputs to control fuel injection, ignition timing, and transmission shift points, while the Engine Control Module oversees combustion processes and emission controls. Together they ensure the engine runs efficiently and meets emissions standards. Proper operation is essential for drivability and fuel economy. replacement PCM for 2018 Chrysler 300 plays a critical role in maintaining vehicle performance.
Where the PCM Is Located and What Replacement Involves
Both the PCM and ECM are mounted within the engine compartment, accessible after removing the intake assembly and several fasteners. Removal typically follows the 0.9‑hour R&R labor time for each unit, while reinstall includes the same effort plus any required torque specifications. Once the new module is in place, the technician secures it with the original hardware and reconnects the wiring harnesses.
How to Reach the PCM on the 2018 Chrysler 300
- Disconnect and isolate the negative battery cable.
- Remove the two push pins that secure the front cowl top panel to the right rear corner o.
- Remove the front cowl top panel.
- Remove the Powertrain Control Module (PCM) retaining bolt.
- Disconnect the PCM electrical connectors.
- Remove the PCM from the vehicle.
Work with the ignition off, and treat the module as static-sensitive: avoid touching the connector pins at any point.
| Operation | Configuration | Book Time |
|---|---|---|
| Powertrain Control Module Relearn | All configurations | 0.5 hr |
| Powertrain Control Module R&R | All configurations | 0.9 hr |
| Engine Control Module Relearn | All configurations | 0.5 hr |
| Engine Control Module Reset | All configurations | 0.3 hr |
| Engine Control Module R&R | All configurations | 0.9 hr |
Programming Requirements After Replacement
After installing a new PCM or ECM, the factory procedure requires programming the unit with the vehicle’s original VIN and mileage to verify identity and software level. Flagship One supplies a a VIN-programmed replacement unit that arrives pre‑loaded, eliminating the need for additional programming steps on the shop floor.
Symptoms of a Failing PCM
Common signs of a failing PCM or ECM in the 2018 Chrysler 300 include a no‑start condition, rough idle, unexpected transmission shifts, and loss of communication with diagnostic tools. You may also see internal fault codes such as internal PCM error appear during a scan, indicating the module is not processing data correctly.
Module Trouble Codes on the 2018 Chrysler 300
The following internal trouble codes have been documented for the 2018 Chrysler 300:
| Code | Meaning | Full Guide |
|---|---|---|
| P0601 | Internal memory checksum error | Full P0601 guide → |
| P0606 | Module processor failure | Full P0606 guide → |
Factory Service Bulletins Worth Knowing
Service Bulletin U60 calls for reprogramming the Powertrain Control Module to address a safety recall. Canadian Recall 30 also references the same PCM reprogram requirement.
| Bulletin | Subject | What It Addresses |
|---|---|---|
| — | Service Bulletins/Recalls • 30 – Canadian Recalls • Safety Recall U60 – Reprogram Powertrain Co | — |
Protecting the PCM in Your 2018 Chrysler 300
- Maintain a healthy charging system to avoid voltage drops.
- Inspect and clean ground straps and connector pins regularly.
- Avoid jump‑start spikes that can stress electronic modules.
- Address any diagnostic codes promptly to prevent escalation.
- Ensure connector seals remain intact to keep moisture out.
Frequently Asked Questions
What labor is required to replace the PCM on a 2018 Chrysler 300?
The factory book time for a PCM removal and replacement is roughly 0.9 hours, covering disconnect, removal, installation, and reconnect steps.
Do I need to program the new PCM with my vehicle’s VIN?
Yes, the factory procedure mandates programming the replacement PCM using the original VIN and mileage to verify the correct software level.
Which service bulletin addresses PCM reprogramming for this model?
Safety Recall U60 specifies the need to reprogram the Powertrain Control Module for the 2018 Chrysler 300.
When the PCM or ECM shows fault codes or symptoms, you can choose a factory‑approved repair or a refurbished replacement that meets the same specifications. Understanding the labor involved and the programming requirements helps you weigh cost against reliability for your 2018 Chrysler 300.
Flagship One stocks a refurbished, VIN-programmed PCM for the 2018 Chrysler 300 with a lifetime warranty, free shipping and no core charge. The full Chrysler 300 module lineup covers other engine configurations as well.
Final Thoughts
The 2018 Chrysler 300 relies on correctly programmed PCM and ECM units for smooth operation. Considering a VIN‑programmed replacement can simplify the repair process while ensuring compliance with factory standards.