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Chrysler 300 PCM, ECM & ECU Replacement
Just Put it in and Drive, no need to visit the dealer!
What the Chrysler 300 PCM, ECM, and ECU Control
Car Computer Exchange remanufactures Chrysler 300 PCMs for every engine the sedan ran from 2005 to 2020, from the 2.7L V6 to the 6.4L HEMI, and ships each one pre-programmed to your VIN. The PCM is the computer that runs your engine and transmission. ECM (engine control module) and ECU (engine control unit) are other names for the same part on a 300.
A failing 300 PCM usually shows up in a few recognizable ways:
- Check engine light that stays on or flashes
- Misfires or stalling for no clear reason
- Hard, delayed, or erratic shifting
- Intermittent no-start or no crank
- A noticeable drop in fuel economy
When a transmission code like P0700 fires next to unrelated engine codes, the module itself is the likely cause, not a single sensor.
Which Chrysler 300 PCM Fits Your Year and Engine (2005-2020)
The right PCM for your Chrysler 300 depends on its model year and engine, because the 300 ran two platforms over its 2005 to 2020 production.
First generation (LX platform, 2005-2010):
- 2.7L V6 and 3.5L V6 (base, Touring, Limited)
- 5.7L HEMI V8 (300C)
- 6.1L HEMI V8 (SRT-8)
Second generation (LD platform, 2011-2020):
- 3.6L Pentastar V6
- 5.7L HEMI V8
- 6.4L HEMI V8 (300 SRT, 2012-2014)
The 5.7L HEMI PCM calibration family is shared across the 300, the Dodge Charger and Challenger, and other Stellantis vehicles, but every module is programmed to one specific VIN, so a 300C PCM does not swap freely between cars. Mopar PCM part numbers fall into the 56029-, 4692-, and 68-prefix families, matched to your exact engine and year. Common picks include the 2005 Chrysler 300C 5.7L PCM, the 2005 Chrysler 300 SRT-8 6.1L PCM, and the 2015 Chrysler 300 3.6L PCM. For other models, browse our Chrysler PCM and ECM catalog.
VIN-Programmed and Synced to Your Chrysler 300's Sentry Key Immobilizer
Every Chrysler 300 PCM we ship is programmed to your VIN and pre-synced to your Sentry Key Immobilizer (SKIM), so the engine starts and runs without a dealer visit. A module that is not matched to the 300's SKIM throws a P0513 invalid-key fault, where the engine cranks but will not run. We transfer the secret-key and immobilizer data during programming so that does not happen.
After you bolt the module in, most 300s need a short crankshaft position sensor relearn, which is a brief drive cycle or a scan-tool step. Model year 2018 and newer 300s also run a Security Gateway, which is why we program every module to your VIN with the latest factory software before it ships. Buying a module pre-programmed to your VIN also skips the dealer's separate programming charge, which on its own can run $180 to $250. The same Sentry Key system runs across other Chrysler models, including the Chrysler Town & Country.
The 13-Point Test Every Chrysler 300 PCM Passes Before Shipping
Before any Chrysler 300 PCM leaves our Raleigh, North Carolina facility, it runs through a 13-point quality check on a computer-aided vehicle simulator that emulates the car's engine, transmission, emissions, and anti-theft systems under load. Every module ships pre-programmed and installs plug-and-play.
Send your old core back in the prepaid box within 21 days and the free lifetime warranty activates. If the module does not solve your 300's issue within 60 days, the money-back guarantee covers a refund or exchange. We have served more than 150,000 vehicle owners since 2011 and hold thousands of verified Google reviews. To pull the exact module for your car, enter your year, make, and model on the Car Computer Exchange home page.
FAQs
Is the ECM the same as the PCM on a Chrysler 300?
Yes. On a Chrysler 300, the PCM (powertrain control module), ECM (engine control module), and ECU (engine control unit) all refer to the same computer, the one that manages the engine and transmission. Parts sellers and forums use the three terms interchangeably for this vehicle, so a listing for a 300 ECM and a listing for a 300 PCM point to the identical module.
How do I know my Chrysler 300's PCM is bad and not just a sensor?
A stored P0601 internal-memory checksum code, or a P0606 processor fault, is the clearest sign the module itself failed rather than a sensor. Before you replace it, confirm the battery voltage, grounds, and PCM connector pins, and check the related fuse. If P0601 or P0606 returns after those checks, the PCM needs replacement and reprogramming.
Why do Chrysler 300 PCMs fail?
Most Chrysler 300 PCM failures come from internal wear. Capacitors degrade and solder joints crack after years of heat cycling under the hood. Voltage spikes from a reversed-polarity jump-start or a failing alternator can also damage the board. These failures show up as internal fault codes rather than a single bad sensor reading.
How much does a Chrysler 300 PCM replacement cost?
A dealer replacement for a Chrysler 300 PCM typically runs $720 to $980 once you add the module, programming, and labor. A remanufactured module pre-programmed to your VIN removes the programming and labor charges because it installs plug-and-play. Exact pricing depends on your year and engine, so check the product page for your specific 300.
Where is the PCM located on a Chrysler 300?
On most Chrysler 300s the PCM sits under the hood on the passenger side near the firewall, beneath the engine-bay cowl. Disconnect the battery before you unplug it, and keep the original mounting bolts. If you are shipping the unit out for service, remove the bracket and hold onto your hardware.
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