1999 Chrysler Concorde PCM Replacement and Reprogramming Guide
The Powertrain Control Module in your 1999 Chrysler Concorde 2.7L serves as the central computer managing engine operations, fuel delivery, and emissions systems. When internal circuitry fails, the module may generate multiple fault codes, cause drivability issues, or prevent the engine from starting entirely. This device also coordinates secondary systems including speed control and the air conditioning compressor relay.
Quick Summary
- The 1999 Chrysler Concorde 2.7L PCM may develop internal faults that generate a cluster of trouble codes and cause drivability problems
- Thirteen module-internal codes were documented for this vehicle, indicating significant internal processor or memory failure
- Factory service bulletin TSB 08-030-06 Rev. A addresses proper PCM initialization procedures
- Replacement units require VIN and mileage programming using a DRB scan tool after installation
- Pre-programmed aftermarket replacements from Flagship One arrive with correct vehicle identification already loaded
If your 1999 Chrysler Concorde with the 2.7L V6 engine has developed a no-start condition, persistent stalling, or a cascade of unrelated fault codes, the Powertrain Control Module may be the culprit. This guide explains how the PCM functions in your specific vehicle, what failure looks like, and what the factory service procedure requires for replacement and programming. You will learn the difference between repair and replacement options, understand the initialization process, and see how pre-programmed units from Flagship One arrive ready to install. The goal is to give you factual, practical knowledge so you can make an informed decision about resolving the issue.
What the PCM Does in a 1999 Chrysler Concorde
The Powertrain Control Module on your Chrysler Concorde acts as the central nervous system for the 2.7L engine. It reads data from numerous sensors positioned throughout the motor and adjusts fuel injection, ignition timing, and emissions controls in real time. Beyond core engine management, this unit also oversees the automatic transmission shift schedule and integrates with comfort features such as speed control. When this computer fails internally, it can no longer reliably process sensor inputs or send proper commands to actuators, which manifests as rough running, failure to start, or unpredictable behavior across multiple vehicle systems. Replacement engine computers for the Concorde must be programmed with the correct vehicle identification to communicate properly with the rest of the network.
Flagship One keeps Chrysler Concorde replacement engine computers in stock for exactly this failure pattern.
Where the PCM Is Located and What Replacement Involves
The Powertrain Control Module on the 1999 Chrysler Concorde 2.7L is typically located in the engine compartment. The factory labor time for removing and reinstalling this component is four-tenths of an hour. After the new module is installed, a relearn procedure requiring an additional five-tenths of an hour must be performed using a factory scan tool. Installation involves reconnecting the negative battery terminal, resetting the clock and radio stations, and verifying that the speed control servo and bracket are properly secured with all fasteners tightened to specification.
How to Reach the PCM on the 1999 Chrysler Concorde
- Remove speed control servo and bracket and reposition out of the way ei.
- Remove washer bottle filler neck.
- Remove Transmission Control Module (TCM) reposition out of the way.
- Remove PCM Disconnect PCM 2 40-way connector.
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 | 0.4 hr |
| Engine Control Module Relearn | All configurations | 0.5 hr |
| Engine Control Module R&R | All configurations | 0.4 hr |
Programming Requirements After Replacement
The factory procedure for your Chrysler Concorde requires using the DRB scan tool to reprogram the replacement PCM with the original vehicle identification number and the recorded odometer reading. After this step, the negative battery cable must be reconnected and the radio and clock reset. Flagship One units arrive as VIN-programmed replacement units, meaning the critical identification programming has already been completed before the module ships. The DRB scan tool may still be needed to verify communication and confirm the relearn process completes successfully.
Every VIN-programmed replacement unit from Flagship One arrives with these steps already completed.
Symptoms of a Failing PCM
A failing Powertrain Control Module on the 1999 Chrysler Concorde 2.7L may cause hard starting or a complete no-start condition when it stops properly controlling fuel and spark. Stalling and rough idle often occur when sensor data can no longer be processed accurately. Multiple unrelated fault codes may appear simultaneously, including sensor circuit codes that have no actual wiring problem. Some owners report that the scan tool cannot communicate with the module at all. Transmission shifting may become erratic or fail to engage properly when the module loses control over hydraulic pressure signals. Memory integrity fault indicating internal problems with the module’s programming memory may trigger and persist even after clearing codes.
Module Trouble Codes on the 1999 Chrysler Concorde
Thirteen module-internal trouble codes were recorded on this vehicle: P0600, P0601, P0622, P0645, P1682, P1683, P1685, P1686, P1687, P1695, P1696, P1697, and P1698. These codes indicate various internal failures within the PCM itself rather than faults in external sensors or wiring. Chrysler groups many of these under the Module Internal category, and they typically do not resolve with resets or repairs to external components.
| Code | Meaning | Full Guide |
|---|---|---|
| P0600 | Module-internal fault | Full P0600 guide → |
| P0601 | Internal memory checksum error | Full P0601 guide → |
| P0622 | Module-internal fault | Full P0622 guide → |
| P0645 | Module-internal fault | Full P0645 guide → |
| P1682 | Module-internal fault | Full P1682 guide → |
| P1683 | Control module fault | Full P1683 guide → |
| P1685 | Module-internal fault | — |
| P1686 | Module-internal fault | — |
| P1687 | Module-internal fault | — |
| P1695 | Module-internal fault | — |
| P1696 | Module-internal fault | — |
| P1697 | Module-internal fault | — |
Factory Service Bulletins Worth Knowing
Chrysler service bulletin TSB 08-030-06 Rev. A specifically addresses Powertrain Control Module Initialization for this model year and engine combination. This bulletin provides the factory-approved procedure for preparing a replacement module for service. The document outlines the steps necessary to ensure the new computer properly integrates with the vehicle’s electrical system and learns the correct parameters for your 2.7L engine. Following the bulletin procedure helps prevent continuation of drivability concerns after installation.
| Bulletin | Subject | What It Addresses |
|---|---|---|
| 08-030-06 Rev. A | 08-030-06 Rev. A Powertrain Control Module Initialization | — |
Protecting the PCM in Your 1999 Chrysler Concorde
- Maintain proper charging system function with regular battery and alternator testing to prevent voltage fluctuations that stress the module
- Ensure all ground connections between the engine and body remain clean and tight to minimize electrical noise
- Avoid jump-starting other vehicles with the Concorde running, as voltage spikes can damage sensitive control circuits
- Address any stored diagnostic codes promptly before they cascade into module-level failures
- Keep electrical connectors and harness seals intact to prevent moisture and contamination from reaching the PCM wiring
Frequently Asked Questions
Can the PCM on my 1999 Chrysler Concorde be repaired instead of replaced?
Internal failures of the Powertrain Control Module cannot typically be repaired through conventional troubleshooting. When the module generates codes like P0601 indicating internal memory problems, replacement with a functioning unit is the standard solution.
Do I need to visit a Chrysler dealer to program a replacement PCM on my Concorde?
The factory procedure requires a DRB scan tool to program the new module with your vehicle identification and mileage. However, pre-programmed replacement units arrive from Flagship One with this information already loaded, which may reduce or eliminate the need for dealer-level programming in many cases.
What happens if I install a used PCM from another vehicle without programming it?
A used module programmed for a different vehicle will retain its original identification data and will not communicate properly with your Concorde. This typically results in a no-start condition, incorrect gauge readings, and persistent fault codes until the proper programming is applied.
When your 1999 Chrysler Concorde 2.7L requires Powertrain Control Module service, you have two primary paths: repair the existing unit if internal damage is minor, or replace it with a new or refurbished module. Given the number and type of codes documented for this vehicle, replacement is often the more reliable solution. Flagship One offers replacement modules that arrive pre-programmed with your specific vehicle identification, potentially saving time and dealer visits. Evaluate your budget and timeline to decide whether a complete replacement or a repair attempt makes sense for your situation.
Flagship One stocks a refurbished, VIN-programmed PCM for the 1999 Chrysler Concorde with a lifetime warranty, free shipping and no core charge. The full Chrysler Concorde module lineup covers other engine configurations as well.
Final Thoughts
The 1999 Chrysler Concorde 2.7L relies on a properly functioning Powertrain Control Module to manage engine operation, transmission shifting, and numerous vehicle systems. When internal faults occur, the module generates specific codes and causes drivability symptoms that point clearly toward replacement. Flagship One provides replacement units that arrive ready to install with your original identification already programmed. If you are experiencing the symptoms described here, consider requesting a quote for a pre-programmed module designed for your vehicle.