2019 Chrysler 300 PCM/ECM Replacement Guide – Symptoms & Programming
The Powertrain Control Module (PCM) in the 2019 Chrysler 300 3.6L manages engine and transmission functions. Failure can cause drivability issues, no-start, and diagnostic trouble codes like P0601. It must be programmed with the original VIN and mileage if replaced.
Quick Summary
- PCM replacement (R&R) book time is 0.9 hours.
- PCM relearn procedure takes 0.5 hours.
- ECM replacement also 0.9 hours, with a 0.5-hour relearn and a 0.3-hour reset option.
- A new PCM must be programmed with the original VIN and mileage.
- Code P0601 indicates an internal PCM fault.
Your 2019 Chrysler 300 3.6L may experience a failing PCM or ECM, leading to drivability concerns or a no-start condition. The powertrain control module is the central computer that controls engine and transmission operation. This guide explains what the module does, common failure symptoms, replacement labor times, and the critical programming step required after installing a new unit. Understanding these aspects helps you diagnose issues accurately and decide on the best repair path, whether that involves a new or refurbished module.
What the PCM Does in a 2019 Chrysler 300
The PCM in the 2019 Chrysler 300 3.6L is the primary electronic controller that manages fuel injection, ignition timing, transmission shift points, and emissions systems. It receives input from sensors throughout the vehicle and adjusts engine parameters in real time. If the PCM fails, the engine may not start, run poorly, or set diagnostic trouble codes. For this vehicle, replacement engine computers for the Chrysler 300 are available that match the original specifications. The module also communicates with other control units via the CAN bus, so a fault can affect multiple systems. Keeping the PCM in good working order is essential for reliable operation and passing emissions tests.
Where the PCM Is Located and What Replacement Involves
The PCM and ECM are typically mounted in the engine compartment, often near the battery or on the firewall. Replacement involves disconnecting the battery, removing electrical connectors, and unbolting the module. The book time for PCM R&R is 0.9 hours, and for ECM R&R is also 0.9 hours. After installation, a relearn procedure is required: 0.5 hours for PCM or ECM, and an ECM reset takes 0.3 hours. If a new PCM is installed, it must be programmed with the original VIN and mileage, as noted in the factory service information. Access may require removing other components, but the labor times reflect typical conditions.
How to Reach the PCM on the 2019 Chrysler 300
- Disconnect and isolate the negative battery cable.
- Remove the cowl plenum cover/grille panel from over the wiper module.
- 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
Factory procedure for a new PCM in the 2019 Chrysler 300 3.6L requires programming the module with the original Vehicle Identification Number (VIN) and mileage, as outlined in section 08 – Electrical/8E. This step ensures the module communicates correctly with the vehicle’s systems. Flagship One provides a VIN-programmed replacement unit that arrives ready to install, so the programming step is already completed. This saves you the time and cost of a dealer visit for that procedure. The relearn process may still be needed after installation to adapt the module to the vehicle’s specific parameters.
Symptoms of a Failing PCM
A failing PCM or ECM in the 2019 Chrysler 300 3.6L often causes a no-start condition, intermittent stalling, or rough running. You may notice misfire codes, transmission shifting issues, or a check engine light. Communication with a scan tool may be lost, indicating the module is not responding. One specific internal fault is internal PCM fault code P0601, which points to a problem within the module itself. Other symptoms include poor fuel economy, hesitation during acceleration, and the vehicle entering a limp-home mode. Addressing these symptoms promptly can prevent further drivability problems.
Module Trouble Codes on the 2019 Chrysler 300
The PCM in the 2019 Chrysler 300 3.6L can store module-internal trouble codes that indicate faults within the control unit itself. One such code is P0601, which is documented for this vehicle. The following table lists these internal codes and their meanings.
| Code | Meaning | Full Guide |
|---|---|---|
| P0601 | Internal memory checksum error | Full P0601 guide → |
Protecting the PCM in Your 2019 Chrysler 300
- Maintain a healthy charging system; voltage spikes can damage the PCM.
- Keep ground connections and wiring harness connectors clean and tight.
- Avoid jump-starting with reversed polarity or using a high-voltage booster.
- Address diagnostic trouble codes promptly to prevent further module stress.
- Inspect connector seals for damage to keep moisture and corrosion out.
- Use only the specified battery type and ensure proper terminal connections.
Frequently Asked Questions
What is the book time for PCM replacement on a 2019 Chrysler 300 3.6L?
The book time for PCM R&R is 0.9 hours. An additional 0.5 hours is allowed for the relearn procedure. If you are replacing the ECM, the times are the same: 0.9 hours for R&R and 0.5 hours for relearn, with a 0.3-hour reset option available.
Does a new PCM for a 2019 Chrysler 300 need to be programmed?
Yes, a new PCM must be programmed with the original VIN and mileage. This is a factory requirement. Flagship One offers pre-programmed units that arrive with the VIN already set, so you can skip that step.
What does code P0601 mean on a 2019 Chrysler 300?
Code P0601 is an internal PCM fault. It indicates a problem within the control module itself, such as a memory or processor error. This often requires module replacement rather than a simple repair.
When your 2019 Chrysler 300 3.6L needs a new PCM or ECM, you have options: repair the existing module or replace it with a new or refurbished unit. Refurbished modules can be a cost-effective solution, but ensure they are properly programmed for your VIN. Flagship One provides pre-programmed units that match your vehicle’s specifications, reducing installation complexity.
Flagship One stocks a refurbished, VIN-programmed PCM for the 2019 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 PCM in your 2019 Chrysler 300 3.6L is a critical component that controls engine and transmission operation. Recognizing symptoms like no-start or code P0601 can guide you to the right fix. Whether you choose a new or refurbished module, proper programming is essential. Flagship One offers VIN-programmed units to simplify the replacement process.